RHSA-2025:7536

Vulnerability from csaf_redhat - Published: 2025-05-14 01:05 - Updated: 2026-03-20 18:28
Summary
Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (python-h11) security update
Severity
Important
Notes
Topic: An update for python-h11 is now available for Red Hat OpenStack Platform 17.1 (Wallaby). 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: Security Fix(es): * h11 accepts some malformed Chunked-Encoding bodies (CVE-2025-43859) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page 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.
CVE-2025-43859

A flaw was found in the h11. This vulnerability allows request smuggling via improper parsing of chunked-coding message bodies, where h11 fails to validate the required \r\n terminators.

7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOS-17.1:python-h11-0:0.12.0-2.1.el9ost.src —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOS-17.1:python3-h11-0:0.12.0-2.1.el9ost.noarch —
Vendor Fix fix
Workaround
Threats
Impact Important
References
To clipboard 

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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