RHSA-2026:80511MediumCVSS 6.5

Red Hat Security Advisory: curl security update

Published
October 12, 2026
Last Modified
October 13, 2026

🔗 CVE IDs covered (2)

CVE-2026-8924 →CVE-2026-11856 →

📋 Description

CVE-2026-8924 — curl: curl: Cookie injection via malicious HTTP server using super cookies CVE-2026-11856 — curl: curl: Information disclosure via incorrect Digest authentication header reuse

🎯 Affected products76

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-0:7.76.1-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-0:7.76.1-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-0:7.76.1-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-0:7.76.1-40.el9_8.8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-0:7.76.1-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debuginfo-0:7.76.1-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • curl-debugsource-0:7.76.1-40.el9_8.8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-minimal-0:7.76.1-40.el9_8.8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-minimal-0:7.76.1-40.el9_8.8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • curl-minimal-0:7.76.1-40.el9_8.8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • +46 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: Do not use trailing-dot hostnames in URLs passed to curl. Trailing dots are uncommon and incompatible with TLS SNI. Upgrade to curl 8.21.0 to resolve 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. Correct usage of the library: Create a fresh handle for a different origin, or explicitly clear authentication-related state before reuse: ```c // req.A curl = curl_easy_init(); ... curl_easy_cleanup(curl); // req.B curl = curl_easy_init(); ... curl_easy_cleanup(curl); ``` Fixed in libcurl 8.21.0; affected range: 7.10.6 – 8.20.0

🔗 References (5)