RHSA-2025:7536 - Security Advisory

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.

Description

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.

Solution

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack 17.1 for RHEL 9 x86_64

Fixes

• BZ - 2362162 - CVE-2025-43859 h11: h11 accepts some malformed Chunked-Encoding bodies

CVEs

• CVE-2025-43859

References

• https://access.redhat.com/security/updates/classification/#important