CVE-2026-27135

EUVD-2026-12919
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` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 42%
Affected Products (NVD)
VendorProductVersion
nghttp2nghttp2
𝑥
< 1.68.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
nghttp2
bookworm
vulnerable
bookworm (security)
1.52.0-1+deb12u3
fixed
bullseye
vulnerable
bullseye (security)
1.43.0-1+deb11u3
fixed
forky
1.69.0-1
fixed
sid
1.69.0-1
fixed
trixie
vulnerable
trixie (security)
1.64.0-1.1+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
nghttp2
bionic
Fixed 1.30.0-1ubuntu1+esm3
released
focal
Fixed 1.40.0-1ubuntu0.3+esm1
released
jammy
Fixed 1.43.0-1ubuntu0.3
released
noble
Fixed 1.59.0-1ubuntu0.3
released
questing
Fixed 1.64.0-1.1ubuntu1.1
released
resolute
Fixed 1.68.0-2ubuntu0.1
released
xenial
Fixed 1.7.1-1ubuntu0.1~esm3
released
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libnghttp2-14
suse enterprise desktop 15 SP7
1.64.0-150700.3.3.1
fixed
suse enterprise sap 15 SP7
1.64.0-150700.3.3.1
fixed
suse enterprise server 12 SP5
1.39.2-3.23.1
fixed
suse enterprise server 15 SP4
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP5
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP6
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP7
1.64.0-150700.3.3.1
fixed
libnghttp2-14-32bit
suse enterprise desktop 15 SP7
1.64.0-150700.3.3.1
fixed
suse enterprise sap 15 SP7
1.64.0-150700.3.3.1
fixed
suse enterprise server 12 SP5
1.39.2-3.23.1
fixed
suse enterprise server 15 SP4
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP5
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP6
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP7
1.64.0-150700.3.3.1
fixed
libnghttp2-devel
suse enterprise desktop 15 SP7
1.64.0-150700.3.3.1
fixed
suse enterprise sap 15 SP7
1.64.0-150700.3.3.1
fixed
suse enterprise server 12 SP5
1.39.2-3.23.1
fixed
suse enterprise server 15 SP4
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP5
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP6
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP7
1.64.0-150700.3.3.1
fixed
libnghttp2_asio-devel
suse enterprise desktop 15 SP7
1.40.0-150600.25.5.1
fixed
suse enterprise sap 15 SP7
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP4
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP5
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP6
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP7
1.40.0-150600.25.5.1
fixed
libnghttp2_asio1
suse enterprise desktop 15 SP7
1.40.0-150600.25.5.1
fixed
suse enterprise sap 15 SP7
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP4
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP5
1.40.0-150200.22.1
fixed
suse enterprise server 15 SP6
1.40.0-150600.25.5.1
fixed
suse enterprise server 15 SP7
1.40.0-150600.25.5.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
libnghttp2
RHEL 8
0:1.33.0-6.el8_10.2
fixed
RHEL 9
0:1.43.0-6.el9_7.1
fixed
libnghttp2-devel
RHEL 8
0:1.33.0-6.el8_10.2
fixed
RHEL 9
0:1.43.0-6.el9_7.1
fixed
nghttp2
RHEL 8
0:1.33.0-6.el8_10.2
fixed
RHEL 9
0:1.43.0-6.el9_7.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libnghttp2
Amazon Linux 2
0:1.41.0-1.amzn2.0.6
fixed
Amazon Linux 2023
0:1.59.0-3.amzn2023.0.2
fixed
libnghttp2-debuginfo
Amazon Linux 2023
0:1.59.0-3.amzn2023.0.2
fixed
libnghttp2-devel
Amazon Linux 2
0:1.41.0-1.amzn2.0.6
fixed
Amazon Linux 2023
0:1.59.0-3.amzn2023.0.2
fixed
nghttp2
Amazon Linux 2
0:1.41.0-1.amzn2.0.6
fixed
Amazon Linux 2023
0:1.59.0-3.amzn2023.0.2
fixed
nghttp2-debuginfo
Amazon Linux 2
0:1.41.0-1.amzn2.0.6
fixed
Amazon Linux 2023
0:1.59.0-3.amzn2023.0.2
fixed
nghttp2-debugsource
Amazon Linux 2023
0:1.59.0-3.amzn2023.0.2
fixed
nodejs22
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-debuginfo
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-debugsource
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-devel
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-docs
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-full-i18n
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-libs
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-libs-debuginfo
Amazon Linux 2023
1:22.22.2-1.amzn2023.0.3
fixed
nodejs22-npm
Amazon Linux 2023
1:10.9.7-1.22.22.2.1.amzn2023.0.3
fixed
nodejs24
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-debuginfo
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-debugsource
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-devel
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-docs
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-full-i18n
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-libs
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-libs-debuginfo
Amazon Linux 2023
1:24.15.0-1.amzn2023.0.2
fixed
nodejs24-npm
Amazon Linux 2023
1:11.12.1-1.24.15.0.1.amzn2023.0.2
fixed
v8-12.4-devel
Amazon Linux 2023
3:12.4.254.21-1.22.22.2.1.amzn2023.0.3
fixed
v8-13.6-devel
Amazon Linux 2023
3:13.6.233.17-1.24.15.0.1.amzn2023.0.2
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
cmake
Azure Linux 3.0
0:3.30.3-13.azl3
fixed
CBL-Mariner 2.0
0:3.21.4-23.cm2
fixed
nghttp2
Azure Linux 3.0
0:1.61.0-3.azl3
fixed
CBL-Mariner 2.0
0:1.57.0-3.cm2
fixed
nodejs
Azure Linux 3.0
0:20.14.0-14.azl3
fixed
nodejs18
CBL-Mariner 2.0
0:18.20.3-12.cm2
fixed
Common Weakness Enumeration
References
https://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1
https://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6
http://www.openwall.com/lists/oss-security/2026/03/20/3
https://lists.debian.org/debian-lts-announce/2026/05/msg00025.html