RHSA-2026:74587
Vulnerability from csaf_redhat - Published: 2026-10-01 17:22 - Updated: 2026-10-02 02:22Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
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-3.14.7-1.3.hum1 (noarch)
* python3-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3-debug-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3-devel-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3-idle-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3-libs-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3-test-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3-tkinter-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-debug-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-devel-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-idle-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-libs-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-test-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-freethreading-tkinter-3.14.7-1.3.hum1 (aarch64, x86_64)
* python3.14-3.14.7-1.3.hum1.src (src)
Security Fix(es):
python3.14:
* CVE-2026-19553
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 Python. When establishing secure connections using the SSLContext.wrap_bio() function with hostname checking enabled, the module fails to validate that a target server hostname is supplied. Because of this missing check, certificate hostname verification is silently skipped rather than triggering an error. A remote man-in-the-middle attacker could exploit this defect to spoof trusted endpoints and intercept or tamper with sensitive encrypted traffic.
7.4 (High)
Affected products
Fixed
31 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:python-unversioned-command-0:3.14.7-1.3.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python-unversioned-command-0:3.14.7-1.3.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-debug-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-debug-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-devel-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-devel-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-idle-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-idle-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-libs-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-libs-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-test-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-test-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-tkinter-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3-tkinter-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-0:3.14.7-1.3.hum1@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-debug-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-debug-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-devel-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-devel-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-idle-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-idle-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-libs-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-libs-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-test-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-test-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-tkinter-0:3.14.7-1.3.hum1@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:python3.14-freethreading-tkinter-0:3.14.7-1.3.hum1@x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Important
References
12 references
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"vulnerabilities": [
{
"cve": "CVE-2026-19553",
"cwe": {
"id": "CWE-295",
"name": "Improper Certificate Validation"
},
"discovery_date": "2026-09-30T16:41:50.203373+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2544127"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Python. When establishing secure connections using the SSLContext.wrap_bio() function with hostname checking enabled, the module fails to validate that a target server hostname is supplied. Because of this missing check, certificate hostname verification is silently skipped rather than triggering an error. A remote man-in-the-middle attacker could exploit this defect to spoof trusted endpoints and intercept or tamper with sensitive encrypted traffic.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "python: python: Certificate verification bypass via missing server_hostname validation in SSLContext.wrap_bio()",
"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": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-19553"
},
{
"category": "external",
"summary": "RHBZ#2544127",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544127"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-19553",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-19553"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-19553",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19553"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/issues/156793",
"url": "https://github.com/python/cpython/issues/156793"
},
{
"category": "external",
"summary": "https://github.com/python/cpython/pull/158503",
"url": "https://github.com/python/cpython/pull/158503"
},
{
"category": "external",
"summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/QNZRG3YOAMTHDCMVCICXGY6YEFPY2VDL/",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/QNZRG3YOAMTHDCMVCICXGY6YEFPY2VDL/"
}
],
"release_date": "2026-09-30T16:17:39.368000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-01T17:22:19+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/",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "python: python: Certificate verification bypass via missing server_hostname validation in SSLContext.wrap_bio()"
}
]
}
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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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