RHSA-2026:71543HighCVSS 7.5

Red Hat Security Advisory: cockpit-image-builder security update

Published
September 24, 2026
Last Modified
September 29, 2026

🔗 CVE IDs covered (4)

CVE-2026-75899 →CVE-2026-75975 →CVE-2026-76172 →CVE-2026-84292 →

📋 Description

CVE-2026-75899 — fast-uri: fast-uri: Server-Side Request Forgery via repeated hostname percent-decoding CVE-2026-75975 — fast-uri: fast-uri: Server-side request forgery via malformed IPv6 normalization CVE-2026-76172 — fast-uri: fast-uri: URI parsing flaw enables server-side request forgery and redirects CVE-2026-84292 — fast-uri: fast-uri: Authority Injection via Unvalidated Port Serialization

🎯 Affected products3

  • Red Hat Enterprise Linux AppStream (v. 10)
  • cockpit-image-builder-0:94.4-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • cockpit-image-builder-0:94.4-1.el10_2.src as a component of Red Hat Enterprise Linux AppStream (v. 10)

✅ 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: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Until updates are available, restrict the processing of user-supplied URIs to trusted sources only, implement strict allowlists for destination hosts (preferably IP-based rather than hostname-based), and apply egress filtering to prevent server-initiated connections to internal networks or cloud metadata services. Workaround: There is no mitigation available for this issue. Apply updates as they become available from Red Hat product teams.

🔗 References (7)