RHSA-2026:15968MediumCVSS 5.9

Red Hat Security Advisory: libsoup3 security update

Published
May 11, 2026
Last Modified
August 18, 2026

🔗 CVE IDs covered (2)

CVE-2026-4271 →CVE-2026-5119 →

📋 Description

CVE-2026-4271 — libsoup: libsoup: Denial of Service via Use-After-Free in HTTP/2 server CVE-2026-5119 — libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment

🎯 Affected products20

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • libsoup3-0:3.6.5-3.el10_1.11.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-0:3.6.5-3.el10_1.11.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-0:3.6.5-3.el10_1.11.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-0:3.6.5-3.el10_1.11.src as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-0:3.6.5-3.el10_1.11.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debuginfo-0:3.6.5-3.el10_1.11.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debuginfo-0:3.6.5-3.el10_1.11.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debuginfo-0:3.6.5-3.el10_1.11.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debuginfo-0:3.6.5-3.el10_1.11.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debugsource-0:3.6.5-3.el10_1.11.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debugsource-0:3.6.5-3.el10_1.11.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debugsource-0:3.6.5-3.el10_1.11.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-debugsource-0:3.6.5-3.el10_1.11.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-devel-0:3.6.5-3.el10_1.11.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-devel-0:3.6.5-3.el10_1.11.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-devel-0:3.6.5-3.el10_1.11.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-devel-0:3.6.5-3.el10_1.11.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • libsoup3-doc-0:3.6.5-3.el10_1.11.noarch as a component of Red Hat Enterprise Linux CodeReady Linux Builder (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 don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: To mitigate this issue, ensure that all HTTP proxies used for HTTPS tunnels are trusted and operate within a secure network. Avoid configuring applications to use untrusted HTTP proxies. If feasible, configure applications to bypass proxies for sensitive connections or utilize a secure proxy solution that encrypts the entire communication channel. A service restart or application reload may be required for changes to take effect.

🔗 References (5)