RHSA-2026:19019
Vulnerability from csaf_redhat - Published: 2026-05-19 13:33 - Updated: 2026-09-10 15:03Summary
Red Hat Security Advisory: python3.14 security update
Severity
Important
Notes
Topic: An update for python3.14 is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.
Security Fix(es):
* cpython: wsgiref.headers.Headers allows header newline injection in Python (CVE-2026-0865)
* cpython: CPython: Logging Bypass in Legacy .pyc File Handling (CVE-2026-2297)
* cpython: Incomplete control character validation in http.cookies (CVE-2026-3644)
* cpython: Stack overflow parsing XML with deeply nested DTD content models (CVE-2026-4224)
* python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519)
* python: Python: HTTP header injection via CR/LF in proxy tunnel headers (CVE-2026-1502)
* python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules (CVE-2026-6100)
* python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API (CVE-2026-4786)
* python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process. (CVE-2026-5713)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Missing newline filtering has been discovered in Python. User-controlled header names and values containing newlines can allow injecting HTTP headers.
4.5 (Medium)
Affected products
Fixed
73 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:python3.14-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-0:3.14.4-2.el10_2.src | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-devel-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-devel-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-devel-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-devel-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-libs-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-libs-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-libs-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-libs-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-tkinter-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-tkinter-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-tkinter-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:python3.14-tkinter-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debug-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debug-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debug-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debug-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debuginfo-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-debugsource-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-debug-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-debug-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-debug-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-debug-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-devel-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-devel-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-devel-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-devel-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-idle-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-idle-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-idle-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-idle-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-libs-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-libs-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-libs-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-libs-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-test-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-test-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-test-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-test-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-tkinter-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-tkinter-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-tkinter-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-freethreading-tkinter-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-idle-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-idle-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-idle-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-idle-0:3.14.4-2.el10_2.x86_64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.aarch64 | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.ppc64le | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.s390x | — |
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| Unresolved product id: CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.x86_64 | — |
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Threats
Impact
Moderate
A flaw was found in Python. This vulnerability allows for the injection of extra information into HTTP communication. Specifically, the system does not properly prevent special characters (carriage return and line feed) from being included in HTTP client proxy tunnel headers or host fields.
4.5 (Medium)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Moderate
A flaw was found in CPython. This vulnerability allows a local user with low privileges to bypass security auditing mechanisms. The issue occurs because the SourcelessFileLoader component, responsible for handling older Python compiled files (.pyc), does not properly trigger system audit events. This oversight could enable malicious activities to go undetected, compromising the integrity of the system.
CWE-778 - Insufficient LoggingAffected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Low
A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update(), |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().
5.4 (Medium)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Moderate
A stack overflow flaw has been discovered in the python pyexpat module. When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs. This will result in a program crash.
5.9 (Medium)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Moderate
A flaw was found in Python. The `webbrowser.open()` API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options, which could lead to unexpected behavior, information disclosure, or potentially arbitrary code execution, impacting the integrity of the system.
7.1 (High)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Important
A flaw was found in the Python webbrowser.open() API. If a specially crafted URL containing "%action" is processed, an attacker could bypass a previous mitigation for CVE-2026-4519. This bypass allows for command injection into the underlying shell, potentially leading to arbitrary code execution.
7.1 (High)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Important
A flaw was found in Python. A malicious Python process could exploit the "profiling.sampling" module and "asyncio introspection capabilities" to read and write memory addresses within a privileged process. This vulnerability occurs when the privileged process connects to the malicious process via its remote debugging feature, potentially leading to information disclosure and arbitrary code execution. Successful exploitation requires repeated connections, which may cause instability in the connecting process.
6.0 (Medium)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Moderate
A flaw was found in Python's decompression modules, including `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile`. This vulnerability, a use-after-free, can occur if a program attempts to re-use a decompression object after a memory allocation error, especially when the system is experiencing high memory usage. Exploitation of this flaw could potentially allow an attacker to execute arbitrary code or access sensitive data. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.
8.1 (High)
Affected products
Fixed
73 products, the same list as for
CVE-2026-0865
Threats
Impact
Important
References
85 references
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"name": "Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)"
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"category": "description",
"text": "Missing newline filtering has been discovered in Python. User-controlled header names and values containing newlines can allow injecting HTTP headers.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cpython: wsgiref.headers.Headers allows header newline injection in Python",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N",
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{
"category": "impact",
"details": "Moderate"
}
],
"title": "cpython: wsgiref.headers.Headers allows header newline injection in Python"
},
{
"cve": "CVE-2026-1502",
"cwe": {
"id": "CWE-93",
"name": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
},
"discovery_date": "2026-04-10T19:01:07.715197+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2457409"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Python. This vulnerability allows for the injection of extra information into HTTP communication. Specifically, the system does not properly prevent special characters (carriage return and line feed) from being included in HTTP client proxy tunnel headers or host fields.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python: Python: HTTP header injection via CR/LF in proxy tunnel headers",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-1502"
},
{
"category": "external",
"summary": "RHBZ#2457409",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457409"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-1502",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-1502"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-1502",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1502"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69",
"url": "https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/146211",
"url": "https://github.com/python/cpython/issues/146211"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/pull/146212",
"url": "https://github.com/python/cpython/pull/146212"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/"
}
],
"release_date": "2026-04-10T17:54:44.121000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N",
"version": "3.1"
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{
"category": "impact",
"details": "Moderate"
}
],
"title": "python: Python: HTTP header injection via CR/LF in proxy tunnel headers"
},
{
"cve": "CVE-2026-2297",
"cwe": {
"id": "CWE-778",
"name": "Insufficient Logging"
},
"discovery_date": "2026-03-04T23:01:09.396553+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2444691"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in CPython. This vulnerability allows a local user with low privileges to bypass security auditing mechanisms. The issue occurs because the SourcelessFileLoader component, responsible for handling older Python compiled files (.pyc), does not properly trigger system audit events. This oversight could enable malicious activities to go undetected, compromising the integrity of the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cpython: CPython: Logging Bypass in Legacy .pyc File Handling",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-2297"
},
{
"category": "external",
"summary": "RHBZ#2444691",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2444691"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-2297",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-2297"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-2297",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2297"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e",
"url": "https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e"
},
{
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"summary": "https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e",
"url": "https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e"
},
{
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"url": "https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86"
},
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"url": "https://github.com/python/cpython/issues/145506"
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"summary": "https://github.com/python/cpython/pull/145507",
"url": "https://github.com/python/cpython/pull/145507"
}
],
"release_date": "2026-03-04T22:10:43.297000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"url": "https://access.redhat.com/errata/RHSA-2026:19019"
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.3,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Low"
}
],
"title": "cpython: CPython: Logging Bypass in Legacy .pyc File Handling"
},
{
"cve": "CVE-2026-3644",
"cwe": {
"id": "CWE-791",
"name": "Incomplete Filtering of Special Elements"
},
"discovery_date": "2026-03-16T18:02:25.997880+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2448168"
}
],
"notes": [
{
"category": "description",
"text": "A control character validation flaw has been discovered in the Python http.cookie module. The Morsel.update(), |= operator, and unpickling paths were not patched to resolve CVE-2026-0672, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cpython: Incomplete control character validation in http.cookies",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-3644"
},
{
"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448168"
},
{
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-3644",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3644"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4",
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},
{
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"summary": "https://github.com/python/cpython/issues/145599",
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},
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"category": "external",
"summary": "https://github.com/python/cpython/pull/145600",
"url": "https://github.com/python/cpython/pull/145600"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/"
}
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"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
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{
"category": "impact",
"details": "Moderate"
}
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"title": "cpython: Incomplete control character validation in http.cookies"
},
{
"cve": "CVE-2026-4224",
"cwe": {
"id": "CWE-805",
"name": "Buffer Access with Incorrect Length Value"
},
"discovery_date": "2026-03-16T19:01:54.161187+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2448181"
}
],
"notes": [
{
"category": "description",
"text": "A stack overflow flaw has been discovered in the python pyexpat module. When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs. This will result in a program crash.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cpython: Stack overflow parsing XML with deeply nested DTD content models",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Moderate severity flaw in CPython\u0027s Expat parser can lead to a denial of service. The vulnerability occurs when an application using the Expat parser with a registered ElementDeclHandler processes an XML document containing a deeply nested Document Type Definition (DTD) content model. Exploitation requires specific conditions, making the attack complexity high.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4224"
},
{
"category": "external",
"summary": "RHBZ#2448181",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448181"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4224",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4224"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4224",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4224"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a",
"url": "https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3",
"url": "https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768",
"url": "https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/145986",
"url": "https://github.com/python/cpython/issues/145986"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/pull/145987",
"url": "https://github.com/python/cpython/pull/145987"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/"
}
],
"release_date": "2026-03-16T17:52:26.639000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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{
"category": "impact",
"details": "Moderate"
}
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"title": "cpython: Stack overflow parsing XML with deeply nested DTD content models"
},
{
"cve": "CVE-2026-4519",
"cwe": {
"id": "CWE-88",
"name": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
},
"discovery_date": "2026-03-20T16:02:13.494105+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2449649"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Python. The `webbrowser.open()` API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options, which could lead to unexpected behavior, information disclosure, or potentially arbitrary code execution, impacting the integrity of the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python: Python: Command-line option injection in webbrowser.open() via crafted URLs",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4519"
},
{
"category": "external",
"summary": "RHBZ#2449649",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449649"
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{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4519",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4519"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4519",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4519"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/143930",
"url": "https://github.com/python/cpython/issues/143930"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/pull/143931",
"url": "https://github.com/python/cpython/pull/143931"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK56Q7Q5IS7B37QFZVVOUS/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK56Q7Q5IS7B37QFZVVOUS/"
}
],
"release_date": "2026-03-20T15:08:32.576000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:19019"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "python: Python: Command-line option injection in webbrowser.open() via crafted URLs"
},
{
"cve": "CVE-2026-4786",
"cwe": {
"id": "CWE-88",
"name": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
},
"discovery_date": "2026-04-13T22:01:38.006388+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2458049"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Python webbrowser.open() API. If a specially crafted URL containing \"%action\" is processed, an attacker could bypass a previous mitigation for CVE-2026-4519. This bypass allows for command injection into the underlying shell, potentially leading to arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw in the Python `webbrowser.open()` API allows for command injection and arbitrary code execution when processing specially crafted URLs containing \"%action\". This bypasses a previous mitigation for CVE-2026-4519.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
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},
{
"category": "external",
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4786",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4786"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/148169",
"url": "https://github.com/python/cpython/issues/148169"
},
{
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"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/JQDUNJVB4AQNTJECSUKOBDU3XCJIPSE5/"
}
],
"release_date": "2026-04-13T21:52:19.036000+00:00",
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"date": "2026-05-19T13:33:20+00:00",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API"
},
{
"cve": "CVE-2026-5713",
"cwe": {
"id": "CWE-822",
"name": "Untrusted Pointer Dereference"
},
"discovery_date": "2026-04-14T16:01:58.710183+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2458239"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Python. A malicious Python process could exploit the \"profiling.sampling\" module and \"asyncio introspection capabilities\" to read and write memory addresses within a privileged process. This vulnerability occurs when the privileged process connects to the malicious process via its remote debugging feature, potentially leading to information disclosure and arbitrary code execution. Successful exploitation requires repeated connections, which may cause instability in the connecting process.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process.",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-5713"
},
{
"category": "external",
"summary": "RHBZ#2458239",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458239"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-5713",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-5713"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-5713",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5713"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/148178",
"url": "https://github.com/python/cpython/issues/148178"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/pull/148187",
"url": "https://github.com/python/cpython/pull/148187"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/OG4RHARYSNIE22GGOMVMCRH76L5HKPLM/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/OG4RHARYSNIE22GGOMVMCRH76L5HKPLM/"
}
],
"release_date": "2026-04-14T15:11:51.122000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 6.0,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process."
},
{
"cve": "CVE-2026-6100",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-04-13T18:01:31.970255+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2457932"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Python\u0027s decompression modules, including `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile`. This vulnerability, a use-after-free, can occur if a program attempts to re-use a decompression object after a memory allocation error, especially when the system is experiencing high memory usage. Exploitation of this flaw could potentially allow an attacker to execute arbitrary code or access sensitive data. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The severity of this flaw is somewhat mitigated on Red Hat platforms. By default processes are not executed with root user privilege and are limited in their scope which in turn limits the impact of this flaw.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-6100"
},
{
"category": "external",
"summary": "RHBZ#2457932",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457932"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-6100",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6100"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-6100",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6100"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/6a5f79c8d7bbf22b083b240910c7a8781a59437d",
"url": "https://github.com/python/cpython/commit/6a5f79c8d7bbf22b083b240910c7a8781a59437d"
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"url": "https://github.com/python/cpython/commit/8fc66aef6d7b3ae58f43f5c66f9366cc8cbbfcd2"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/commit/c3cf71c3366fe49acb776a639405c0eea6169c20",
"url": "https://github.com/python/cpython/commit/c3cf71c3366fe49acb776a639405c0eea6169c20"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/148395",
"url": "https://github.com/python/cpython/issues/148395"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/pull/148396",
"url": "https://github.com/python/cpython/pull/148396"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/HTWB2Z6KT5QQX4RYEZAFININDHNOSIF3/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/HTWB2Z6KT5QQX4RYEZAFININDHNOSIF3/"
}
],
"release_date": "2026-04-13T17:15:47.606000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-19T13:33:20+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:19019"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.ppc64le",
"CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.s390x",
"CRB-10.2.Z:python3.14-test-0:3.14.4-2.el10_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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