MSRXCVE-2026-97629
CVE-2026-97629
NGINX ngx_http_ssl_module vulnerability
CVSS 4.0 · CNA · f5.com
chance of exploitation in the next 30 days (EPSS; higher than 13% of CVEs)
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.
Scores
Affected products
- F5 NGINX Plus: 37.1.0 to < 37.1.0.1; 37.0.0 to < 37.0.5.1; R36 to < *; R35 to < *; R34 to < *; R33 to < *
- F5 NGINX Open Source: 1.31.0 to < 1.31.7; 1.30.0 to < 1.30.6; 1.23.3 to < *
Weakness: CWE-908
1 references (advisories, patches, write-ups)
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.