High · CVSS 8.3CVE-2026-97629

NGINX ngx_http_ssl_module vulnerabilityCVE-2026-97629

Answer in brief

CVE-2026-97629 records a High severity (CVSS 8.3) vulnerability in NGINX ngx_http_ssl_module vulnerability. The current sources do not mark it as known exploited. The current feed maps F5/NGINX Open Source (generic), F5/NGINX Plus (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 14, 2026Updated Oct 14, 2026Source checked Oct 14, 2026First seen by HOL Oct 14, 2026Material review Oct 14, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.3
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps F5/NGINX Open Source (generic), F5/NGINX Plus (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
F5/NGINX Open Sourcegeneric	>=1.31.0 <1.31.7 \|\| >=1.30.0 <1.30.6 \|\| >=1.23.3 <*	1.31.7, 1.30.6, *
F5/NGINX Plusgeneric	>=37.1.0 <37.1.0.1 \|\| >=37.0.0 <37.0.5.1 \|\| >=R36 <* \|\| >=R35 <* \|\| >=R34 <* \|\| >=R33 <*	37.1.0.1, 37.0.5.1, *

Recommended response

Check inventory. Check lockfiles and deployed manifests for F5/NGINX Open Source, F5/NGINX Plus.
Review the reported fix. Source-reported workaround: Do not enable automatic rotation of SSL session ticket keys: option a) remove the "ssl_session_cache shared:name:size" directive; https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache option b) switch to loading static ticket keys from a file using the "ssl_session_ticket_key" directive. https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key Systems that disable session tickets ("ssl_session_tickets off;") are not affected. https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_tickets

Evidence timeline and material changes

Published upstream
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 14, 2026

Sources and claim methodology

Source referencemy.f5.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.