Description
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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| nghttp2 | nghttp2 | < 1.68.1 |
| Red Hat | JBoss Core Services for RHEL 8 | — |
| Red Hat | JBoss Core Services on RHEL 7 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat JBoss Core Services 2.4.62.SP4 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | RHEL-8 based Middleware Containers | — |
| Red Hat | Red Hat AI Inference Server 3.2 | — |
| Red Hat | Red Hat AI Inference Server 3.2 | — |
| Red Hat | Red Hat AI Inference Server 3.2 | — |
References
- https://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1Patch
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/03/20/3Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2026/05/msg00025.html
- https://access.redhat.com/errata/RHSA-2026:10065
- https://access.redhat.com/errata/RHSA-2026:11768
- https://access.redhat.com/errata/RHSA-2026:13812
- https://access.redhat.com/errata/RHSA-2026:14773
- https://access.redhat.com/errata/RHSA-2026:14937
- https://access.redhat.com/errata/RHSA-2026:15087
- https://access.redhat.com/errata/RHSA-2026:16008
- https://access.redhat.com/errata/RHSA-2026:16009
- https://access.redhat.com/errata/RHSA-2026:16030
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:17596
- https://access.redhat.com/errata/RHSA-2026:19724
- https://access.redhat.com/errata/RHSA-2026:19725
- https://access.redhat.com/errata/RHSA-2026:20040
- https://access.redhat.com/errata/RHSA-2026:20087
- https://access.redhat.com/errata/RHSA-2026:21656
- https://access.redhat.com/errata/RHSA-2026:21690
- https://access.redhat.com/errata/RHSA-2026:21695
- https://access.redhat.com/errata/RHSA-2026:25096
- https://access.redhat.com/errata/RHSA-2026:27200
- https://access.redhat.com/errata/RHSA-2026:27201
- https://access.redhat.com/errata/RHSA-2026:6190
- https://access.redhat.com/errata/RHSA-2026:7080
- https://access.redhat.com/errata/RHSA-2026:7123
- https://access.redhat.com/errata/RHSA-2026:7302
- https://access.redhat.com/errata/RHSA-2026:7310
- https://access.redhat.com/errata/RHSA-2026:7350
- https://access.redhat.com/errata/RHSA-2026:7666
- https://access.redhat.com/errata/RHSA-2026:7667
- https://access.redhat.com/errata/RHSA-2026:7668
- https://access.redhat.com/errata/RHSA-2026:7670
- https://access.redhat.com/errata/RHSA-2026:7675
- https://access.redhat.com/errata/RHSA-2026:7896
- https://access.redhat.com/errata/RHSA-2026:7983
- https://access.redhat.com/errata/RHSA-2026:8339
- https://access.redhat.com/errata/RHSA-2026:8538
- https://access.redhat.com/errata/RHSA-2026:8539
- https://access.redhat.com/errata/RHSA-2026:8540
- https://access.redhat.com/errata/RHSA-2026:8541
- https://access.redhat.com/errata/RHSA-2026:8545
- https://access.redhat.com/errata/RHSA-2026:8546
- https://access.redhat.com/errata/RHSA-2026:8547
- https://access.redhat.com/errata/RHSA-2026:8548
- https://access.redhat.com/errata/RHSA-2026:8868
- https://access.redhat.com/errata/RHSA-2026:9711
- https://access.redhat.com/errata/RHSA-2026:9832
- https://access.redhat.com/errata/RHSA-2026:9874
- https://access.redhat.com/security/cve/CVE-2026-27135
- https://bugzilla.redhat.com/show_bug.cgi?id=2448754
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27135.json
Timeline
- Published
- Mar 18, 2026
- Last modified
- Nov 10, 2026
- NVD status
- Modified