What is RHSA-2025:7536?

RHSA-2025:7536 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (python-h11) security update

Which CVE IDs does RHSA-2025:7536 cover?

RHSA-2025:7536 covers the following CVE IDs: CVE-2025-43859. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2025:7536?

RHSA-2025:7536 has a CVSS v3 base score of 7.4, published by Red Hat Product Security.

Which products are affected by RHSA-2025:7536?

RHSA-2025:7536 affects 3 products, including: Red Hat OpenStack Platform 17.1; python-h11-0:0.12.0-2.1.el9ost.src as a component of Red Hat OpenStack Platform 17.1; python3-h11-0:0.12.0-2.1.el9ost.noarch as a component of Red Hat OpenStack Platform 17.1.

RHSA-2025:7536HighCVSS 7.4

Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (python-h11) security update

Vendor

Red Hat Product Security

Published

May 14, 2025

Last Modified

August 15, 2026

🔗 CVE IDs covered (1)

CVE-2025-43859 →

📋 Description

CVE-2025-43859 — h11: h11 accepts some malformed Chunked-Encoding bodies

🎯 Affected products3

Red Hat OpenStack Platform 17.1
python-h11-0:0.12.0-2.1.el9ost.src as a component of Red Hat OpenStack Platform 17.1
python3-h11-0:0.12.0-2.1.el9ost.noarch as a component of Red Hat OpenStack Platform 17.1

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Ensure any applications using h11 are behind a correctly configured reverse proxy will prevent exploitation of this flaw.

🔗 References (4)

selfhttps://access.redhat.com/errata/RHSA-2025:7536
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2362162
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_7536.json