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OpenAdvisories
High ALSA-2026:7666 1 CVE

Important: nghttp2 security update

Published Apr 13, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 (HTTP/2) protocol in C.

Security Fix(es):

* nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination (CVE-2026-27135)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 3

ReleasePackageFixed in
AlmaLinux · 10 libnghttp2 1.64.0-2.el10_1.1
AlmaLinux · 10 libnghttp2-devel 1.64.0-2.el10_1.1
AlmaLinux · 10 nghttp2 1.64.0-2.el10_1.1

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

  • report
    https://access.redhat.com/security/cve/CVE-2026-27135
  • report
    https://bugzilla.redhat.com/2448754
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-7666.html