Description
Description
When NGINX Plus or NGINX Open Source is configured with ssl_session_cache
shared:name:size
without an explicit ssl_session_ticket_key file directives to automatically rotate SSL session ticket keys, a remote unauthenticated attacker is able to forge client SSL sessions
in a non-deterministic manner that is beyond the attacker's control. An attacker could leverage this vulnerability to bypass verification of client certificates.
Impact
This vulnerability can lead to the exposure of resources or functionality to unintended actors, possibly providing attackers with access to sensitive information. There is no control plane exposure; this is a data plane issue only.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| F5 | NGINX Plus | 37.1.0 – < 37.1.0.1, 37.0.0 – < 37.0.5.1, R36, R35, R34, R33 | 37.1.0.1 |
| F5 | NGINX Open Source | 1.31.0 – < 1.31.7, 1.30.0 – < 1.30.6, 1.23.3 | 1.31.7 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nginx | 1.30.4-8 | — |
| Debian 13 | nginx | 1.26.3-3+deb13u10 | — |
| Debian 12 | nginx | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | nginx | 1.30.4-7ubuntu1.1 | USN-8955-1 |
| Ubuntu 26.04 LTS | nginx | 1.28.3-2ubuntu1.12 | USN-8955-1 |
| Ubuntu 24.04 LTS | nginx | 1.24.0-2ubuntu7.19 | USN-8955-1 |
| Ubuntu 22.04 LTS | nginx | 1.18.0-6ubuntu14.22 | USN-8955-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | nginx +11 | 1.30.6-1.hum1 | RHSA-2026:83427 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nginx | 1.31.7-1.1 | openSUSE-SU-2026:12143-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nginx | 1.30.6-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nginx +9 | 1:1.30.6-1.amzn2023.0.1 | ALAS2023-2026-3263 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | nginx | 1.30.6-1 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | ingress-nginx-controller-1.15 | 1.15.12-r0 | — |
| Wolfi rolling | nginx-mainline | 1.31.7-r0 | — |
| Wolfi rolling | nginx-stable | 1.30.6-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
PhiNode-Labs/nginx-cve-2026-97629 ★ 0 · Oct 21, 2026
CVE-2026-97629 — nginx TLS session-ticket forgery that can bypass client-certificate (mTLS) authentication. Root cause, one-line patch, proof-of-concept exploit and reproduction evidence. Found and d…
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- WID-SEC-2026-3948 NGINX: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- USN-8955-1 nginx vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
- ALAS2023-2026-3263 Moderate: nginx security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 26, 2026
- RHSA-2026:83427 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- openSUSE-SU-2026:12143-1 nginx-1.31.7-1.1 on GA media SUSE / openSUSE Security Updates · Oct 16, 2026
References
- https://my.f5.com/manage/s/article/K000162606 vendor-advisory