CVE-2026-97629 NGINX ngx_http_ssl_module vulnerability
Remote attackers can bypass client certificate verification in NGINX when specific SSL session cache configurations are used without ticket key rotation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97629?
CVE-2026-97629 is a high-severity authentication bypass vulnerability in F5 NGINX Open Source, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-908
Which versions are affected by CVE-2026-97629?
2 open source packages ship an affected version, including nginx and nginx-gateway.
| Package | Affected | Fixed in |
|---|---|---|
nginx Bitnami | From 0.1.29 | 1.30.6, 1.31.7 |
nginx-gateway Bitnami | From 0.1.29 | 2.2.1 |
How do I fix CVE-2026-97629?
Upgrade nginx to a fixed version for your release line: 1.30.6 or 1.31.7.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-97629 being exploited?
There is no known exploitation of CVE-2026-97629 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as ALPINE-CVE-2026-97629, AZL-108458, BELL-CVE-2026-97629, BIT-nginx-2026-97629, BIT-nginx-gateway-2026-97629, DEBIAN-CVE-2026-97629 and 3 more.