What is RHSA-2026:28043?

RHSA-2026:28043 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (python-urllib3) security update

Which CVE IDs does RHSA-2026:28043 cover?

RHSA-2026:28043 covers the following CVE IDs: CVE-2025-66418, CVE-2025-66471, CVE-2026-21441. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:28043?

RHSA-2026:28043 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

RHSA-2026:28043HighCVSS 7.5

Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (python-urllib3) security update

Vendor

Red Hat Product Security

Published

June 22, 2026

Last Modified

July 6, 2026

🔗 CVE IDs covered (3)

CVE-2025-66418 →CVE-2025-66471 →CVE-2026-21441 →

📋 Description

CVE-2025-66418 — urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion CVE-2025-66471 — urllib3: urllib3 Streaming API improperly handles highly compressed data CVE-2026-21441 — urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API)

🔗 References (6)

selfhttps://access.redhat.com/errata/RHSA-2026:28043
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2419455
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2419467
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2427726
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_28043.json