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OpenAdvisories
High RHSA-2026:8540 1 CVE

Red Hat Security Advisory: nghttp2 security update

Published Apr 17, 2026 · Updated Oct 16, 2026

Ecosystem: Red Hat

Fixed packages 10

ReleasePackageFixed in
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos libnghttp2 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos libnghttp2-debuginfo 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos nghttp2 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos nghttp2-debuginfo 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos nghttp2-debugsource 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 TUS rhel_tus:8.8::baseos libnghttp2 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 TUS rhel_tus:8.8::baseos libnghttp2-debuginfo 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 TUS rhel_tus:8.8::baseos nghttp2 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 TUS rhel_tus:8.8::baseos nghttp2-debuginfo 0:1.33.0-5.el8_8.2
Red Hat · RHEL 8.8 TUS rhel_tus:8.8::baseos nghttp2-debugsource 0:1.33.0-5.el8_8.2

Vulnerabilities 1

  • High 7.5
    CVE-2026-27135

    nghttp2 Denial of service: Assertion failure due to the missing state validation

    nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2…

    nghttp2 nghttp2 nodejs cmake Debian Ubuntu Azure Linux Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2448754
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_8540.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-27135
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-27135
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-27135
  • article
    https://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1
  • article
    https://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6