Red Hat Security Advisory: python-urllib3 security update
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): * urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471) 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.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2025-66471 involves the python-urllib3 library's Streaming API improperly handling highly compressed data. This flaw could potentially lead to security issues when processing such data streams. Red Hat has released security advisories (RHSA-2026:9031 and RHSA-2026:34527) detailing the issue and providing updated packages to remediate the vulnerability. The affected products include Red Hat Enterprise Linux Server Extended Lifecycle Support 7 on multiple architectures and Red Hat Satellite. The advisories emphasize the importance of applying the updates to mitigate the risk.
Potential Impact
Improper handling of highly compressed data by the urllib3 Streaming API could lead to security risks, though specific impact details are not provided in the advisory. Red Hat rates the security impact as Important, indicating a significant potential risk if unpatched. There are no known exploits in the wild reported at this time.
Mitigation Recommendations
Red Hat has released updated python-urllib3 packages that address this vulnerability. Users of affected Red Hat products should apply the official security updates as described in the Red Hat advisories RHSA-2026:9031 and RHSA-2026:34527. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation actions are specified or required beyond applying these updates.
Red Hat Security Advisory: python-urllib3 security update
Description
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): * urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471) 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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2025-66471 involves the python-urllib3 library's Streaming API improperly handling highly compressed data. This flaw could potentially lead to security issues when processing such data streams. Red Hat has released security advisories (RHSA-2026:9031 and RHSA-2026:34527) detailing the issue and providing updated packages to remediate the vulnerability. The affected products include Red Hat Enterprise Linux Server Extended Lifecycle Support 7 on multiple architectures and Red Hat Satellite. The advisories emphasize the importance of applying the updates to mitigate the risk.
Potential Impact
Improper handling of highly compressed data by the urllib3 Streaming API could lead to security risks, though specific impact details are not provided in the advisory. Red Hat rates the security impact as Important, indicating a significant potential risk if unpatched. There are no known exploits in the wild reported at this time.
Mitigation Recommendations
Red Hat has released updated python-urllib3 packages that address this vulnerability. Users of affected Red Hat products should apply the official security updates as described in the Red Hat advisories RHSA-2026:9031 and RHSA-2026:34527. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation actions are specified or required beyond applying these updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:1734
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-21441"]
Threat ID: 6a160973e29bf47b5063be77
Added to database: 05/26/2026, 20:58:27 UTC
Last enriched: 08/10/2026, 17:59:20 UTC
Last updated: 09/14/2026, 22:01:30 UTC
Views: 104
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