RHSA-2026:70599MediumCVSS 7.5

Red Hat Security Advisory: libsoup security update

Published
September 23, 2026
Last Modified
November 5, 2026

🔗 CVE IDs covered (2)

CVE-2026-15709 →CVE-2026-15711 →

📋 Description

CVE-2026-15709 — SoupWebsocketExtensionDeflate: libsoup: libsoup: WebSocket permessage-deflate Unbounded Decompression Remote Denial of Service CVE-2026-15711 — libsoup: SoupWebsocketConnection: libsoup: WebSocket remote denial of service via oversized control frame protocol violation

🎯 Affected products48

  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.s390x as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.src as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • libsoup-0:2.62.3-2.el8_4.10.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.s390x as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.s390x as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • libsoup-debuginfo-0:2.62.3-2.el8_4.10.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debugsource-0:2.62.3-2.el8_4.10.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libsoup-debugsource-0:2.62.3-2.el8_4.10.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • libsoup-debugsource-0:2.62.3-2.el8_4.10.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • +18 more not shown

✅ 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.

🔗 References (5)