RHSA-2026:25039
Vulnerability from csaf_redhat - Published: 2026-06-10 09:34 - Updated: 2026-07-15 19:20A flaw was found in Prometheus, an open-source monitoring system. The `client_secret` field within the Azure Active Directory (AD) remote write OAuth configuration was incorrectly handled as a plain string instead of a secure Secret type. This misconfiguration allowed any user or process with access to the `/-/config` HTTP API endpoint to view the Azure OAuth client secret in plaintext. This vulnerability leads to information disclosure, potentially compromising the security of integrated Azure AD services.
A flaw was found in Prometheus. An unauthenticated attacker can exploit the remote read endpoint (`/api/v1/read`) by sending a specially crafted, small snappy-compressed payload. This payload causes a disproportionately large memory allocation, leading to memory exhaustion and a Denial of Service (DoS) by crashing the Prometheus process.
A flaw was found in urllib3, an HTTP client library for Python. When using the low-level API via `ProxyManager.connection_from_url().urlopen()` with `assert_same_host=False`, cross-origin redirects can still forward sensitive headers. This could allow a remote attacker to gain unauthorized access to sensitive information.
A flaw was found in urllib3, an HTTP client library for Python. This vulnerability allows a remote attacker to cause excessive resource consumption, such as high CPU usage and massive memory allocation, on the client side. This occurs when urllib3 attempts to decompress an entire HTTP response, even if only a partial read was requested, or when draining the connection after a partial decompression. This can lead to a Denial of Service (DoS) condition.
A flaw was found in the idna library, which handles Internationalized Domain Names in Python applications. A remote attacker could exploit this vulnerability by sending specially crafted, excessively long inputs to the library's encoding function. This could cause the system to consume significant resources, leading to a Denial of Service (DoS), where the affected application becomes unavailable to legitimate users. This issue stems from an incomplete fix for a previously identified vulnerability.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:jaeger-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:jaeger-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:jaeger-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
A flaw was found in joserfc, a Python library for JSON Object Signing and Encryption (JOSE). This vulnerability allows a remote attacker to cause resource exhaustion, leading to a Denial of Service (DoS), by sending oversized JSON Web Signature (JWS) payloads. The library fails to apply size limits, specifically JWSRegistry.max_payload_length, when processing RFC7797 b64=false JWS payloads.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:jaeger-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:jaeger-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:jaeger-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
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]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "urllib3: urllib3: Information disclosure via cross-origin redirects forwarding sensitive headers"
},
{
"cve": "CVE-2026-44432",
"cwe": {
"id": "CWE-409",
"name": "Improper Handling of Highly Compressed Data (Data Amplification)"
},
"discovery_date": "2026-05-13T17:01:01.083841+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2477154"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in urllib3, an HTTP client library for Python. This vulnerability allows a remote attacker to cause excessive resource consumption, such as high CPU usage and massive memory allocation, on the client side. This occurs when urllib3 attempts to decompress an entire HTTP response, even if only a partial read was requested, or when draining the connection after a partial decompression. This can lead to a Denial of Service (DoS) condition.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "urllib3: urllib3: Denial of Service due to excessive HTTP response decompression",
"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": {
"fixed": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-44432"
},
{
"category": "external",
"summary": "RHBZ#2477154",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477154"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-44432",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-44432"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-44432",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44432"
},
{
"category": "external",
"summary": "https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j",
"url": "https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j"
}
],
"release_date": "2026-05-13T15:17:12.611000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-10T09:34:54+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:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:25039"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "urllib3: urllib3: Denial of Service due to excessive HTTP response decompression"
},
{
"cve": "CVE-2026-45409",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-06-05T23:01:44.292958+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2485616"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the idna library, which handles Internationalized Domain Names in Python applications. A remote attacker could exploit this vulnerability by sending specially crafted, excessively long inputs to the library\u0027s encoding function. This could cause the system to consume significant resources, leading to a Denial of Service (DoS), where the affected application becomes unavailable to legitimate users. This issue stems from an incomplete fix for a previously identified vulnerability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python-idna: idna: Denial of Service via specially crafted long inputs",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A flaw was found in the python-idna library. This is an incomplete fix for CVE-2024-3651. The idna.encode() function performs contextual validation checks (valid_contexto) before rejecting oversized inputs, allowing specially crafted long payloads to cause excessive CPU consumption and lead to a denial of service. The fix in version 3.14 rejects long inputs early before further processing, and version 3.15 extends this approach to alternate per-label conversion and codec functions.",
"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": {
"fixed": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-45409"
},
{
"category": "external",
"summary": "RHBZ#2485616",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485616"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45409",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45409"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45409",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45409"
},
{
"category": "external",
"summary": "https://github.com/kjd/idna/security/advisories/GHSA-65pc-fj4g-8rjx",
"url": "https://github.com/kjd/idna/security/advisories/GHSA-65pc-fj4g-8rjx"
}
],
"release_date": "2026-06-05T22:06:07.082000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-10T09:34:54+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:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:25039"
},
{
"category": "workaround",
"details": "To mitigate this denial-of-service vulnerability, applications utilizing the `idna` Python library should implement input validation to ensure that domain names do not exceed the standard 253-character length limit before being passed to the `idna.encode()` function. This operational control prevents the processing of excessively long inputs that could lead to resource exhaustion and service unavailability.\n\nApplications that pass user-controlled data directly to `idna.encode()` without validation checks (e.g.: DNS length \u003c 254 chars) are affected.",
"product_ids": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "python-idna: idna: Denial of Service via specially crafted long inputs"
},
{
"cve": "CVE-2026-48990",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-06-17T22:00:51.839483+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2490168"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in joserfc, a Python library for JSON Object Signing and Encryption (JOSE). This vulnerability allows a remote attacker to cause resource exhaustion, leading to a Denial of Service (DoS), by sending oversized JSON Web Signature (JWS) payloads. The library fails to apply size limits, specifically JWSRegistry.max_payload_length, when processing RFC7797 b64=false JWS payloads.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "joserfc: joserfc: Resource exhaustion via oversized JSON Web Signature (JWS) payloads",
"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": {
"fixed": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-48990"
},
{
"category": "external",
"summary": "RHBZ#2490168",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490168"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-48990",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-48990"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-48990",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48990"
},
{
"category": "external",
"summary": "https://github.com/authlib/joserfc/releases/tag/1.6.7",
"url": "https://github.com/authlib/joserfc/releases/tag/1.6.7"
},
{
"category": "external",
"summary": "https://github.com/authlib/joserfc/security/advisories/GHSA-wphv-vfrh-23q5",
"url": "https://github.com/authlib/joserfc/security/advisories/GHSA-wphv-vfrh-23q5"
}
],
"release_date": "2026-06-17T21:08:10.534000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-10T09:34:54+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:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:25039"
},
{
"category": "workaround",
"details": "The risk can be mitigated by rejecting oversized serialized JWS inputs before they reach joserfc and enforcing strict request/body size limits at the application or reverse-proxy layer.",
"product_ids": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:jaeger-main@aarch64",
"Red Hat Hardened Images:jaeger-main@src",
"Red Hat Hardened Images:jaeger-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "joserfc: joserfc: Resource exhaustion via oversized JSON Web Signature (JWS) payloads"
}
]
}
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.