Medium 6.5Published Oct 14, 2026

CVE-2026-97629NGINX ngx_http_ssl_module vulnerability

Updated under an hour ago (2026-10-19 05:50 UTC)

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It affects F5 NGINX Plus and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for F5 NGINX Plus

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-908
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: f5
NVD analysis: Awaiting Analysis
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

F5 NGINX Plus f5:nginx_plus (from the name)	from 37.1.0 before 37.1.0.1; from 37.0.0 before 37.0.5.1; from R36; from R35; from R34; from R33	CNA record
F5 NGINX Open Source f5:nginx_open_source (from the name)	from 1.31.0 before 1.31.7; from 1.30.0 before 1.30.6; from 1.23.3	CNA record

References

https://my.f5.com/manage/s/article/K000162606vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.