RHSA-2026:5994
Vulnerability from csaf_redhat - Published: 2026-03-30 00:34 - Updated: 2026-04-21 19:45Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
python3.14:
* python-unversioned-command-3.14.3-2.hum1 (noarch)
* python3-3.14.3-2.hum1 (aarch64, x86_64)
* python3-debug-3.14.3-2.hum1 (aarch64, x86_64)
* python3-devel-3.14.3-2.hum1 (aarch64, x86_64)
* python3-idle-3.14.3-2.hum1 (aarch64, x86_64)
* python3-libs-3.14.3-2.hum1 (aarch64, x86_64)
* python3-test-3.14.3-2.hum1 (aarch64, x86_64)
* python3-tkinter-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-debug-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-devel-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-idle-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-libs-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-test-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-freethreading-tkinter-3.14.3-2.hum1 (aarch64, x86_64)
* python3.14-3.14.3-2.hum1.src (source)
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.
A flaw was found in the poplib module in the Python standard library. The poplib module does not reject control characters, such as newlines, in user-controlled input passed to POP3 commands. This issue allows an attacker to inject additional commands to be executed in the POP3 server.
7.1 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/
https://access.redhat.com/errata/RHSA-2026:5994
Workaround
To mitigate this vulnerability, ensure that no data passed to the poplib module contains newline or carriage return characters.
References
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"cwe": {
"id": "CWE-77",
"name": "Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)"
},
"discovery_date": "2026-01-20T22:02:09.399038+00:00",
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"product_ids": [
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"text": "2431373"
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"notes": [
{
"category": "description",
"text": "A flaw was found in the poplib module in the Python standard library. The poplib module does not reject control characters, such as newlines, in user-controlled input passed to POP3 commands. This issue allows an attacker to inject additional commands to be executed in the POP3 server.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cpython: POP3 command injection in user-controlled commands",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this issue, an attacker needs to have the privileges required to send malicious input to an application that sends POP3 commands to a server. Additionally, this flaw can allow attackers to manipulate the state of the mailbox (e.g., delete emails) and to potentially read metadata or specific email content, but it does not allow arbitrary code execution or OS command injection. Due to these reasons, this issue has been rated with a moderate severity.",
"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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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15367"
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{
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"summary": "https://github.com/python/cpython/issues/143923",
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"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/"
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"release_date": "2026-01-20T21:47:09.885000+00:00",
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{
"category": "vendor_fix",
"date": "2026-03-30T00:34:19+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:python3-14-main@aarch64",
"Red Hat Hardened Images:python3-14-main@src",
"Red Hat Hardened Images:python3-14-main@x86_64"
],
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"url": "https://access.redhat.com/errata/RHSA-2026:5994"
},
{
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"details": "To mitigate this vulnerability, ensure that no data passed to the poplib module contains newline or carriage return characters.",
"product_ids": [
"Red Hat Hardened Images:python3-14-main@aarch64",
"Red Hat Hardened Images:python3-14-main@noarch",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:python3-14-main@aarch64",
"Red Hat Hardened Images:python3-14-main@noarch",
"Red Hat Hardened Images:python3-14-main@src",
"Red Hat Hardened Images:python3-14-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "cpython: POP3 command injection in user-controlled commands"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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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