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CVE-2026-97629— NGINX ngx_http_ssl_module vulnerability

Quick assessment

Affected
F5 NGINX Plus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 forg

CVSS 6.5 · Medium

Affected Version Matrix 9

VendorProduct Version RangeStatus
F5 NGINX Open Source 1.31.0< 1.31.7 affected
1.30.0< 1.30.6 affected
1.23.3< * affected
F5 NGINX Plus 37.1.0< 37.1.0.1 affected
37.0.0< 37.0.5.1 affected
R36< * affected
R35< * affected
R34< * affected
R33< * affected
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I. Basic Information for CVE-2026-97629

Vulnerability Information

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Vulnerability Title
NGINX ngx_http_ssl_module vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 NGINX Plus 37.1.0 ~ 37.1.0.1 -
F5 NGINX Open Source 1.31.0 ~ 1.31.7 -

II. Public POCs for CVE-2026-97629

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III. Intelligence Information for CVE-2026-97629

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Other References for CVE-2026-97629 (1)

Same Patch Batch · F5 · 2026-10-14 · 11 CVEs total

CVE-2026-91184 8.8 HIGH NGINX Gateway Fabric vulnerability
CVE-2026-93479 8.1 HIGH NGINX map directive and regex matching vulnerability
CVE-2026-15176 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-97205 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-94197 7.5 HIGH NGINX Ingress Controller vulnerability
CVE-2026-104939 7.5 HIGH NGINX Ingress Controller vulnerability
CVE-2026-101019 6.5 MEDIUM NGINX ngx_http_js_module vulnerability
CVE-2026-96615 6.5 MEDIUM NGINX Gateway Fabric vulnerability
CVE-2026-95101 5.3 MEDIUM NGINX ngx_http_v3_module vulnerability
CVE-2026-101025 5.3 MEDIUM NGINX ngx_http_js_module vulnerability

IV. Related Vulnerabilities

Same product: NGINX Plus
Same vendor: F5
Same weakness: CWE-908

V. Comments for CVE-2026-97629

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