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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-40701

NGINX ngx_http_ssl_module vulnerability

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Status
Published
Published
Updated
Assigning organization
f5

Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

F5 NGINX Plus

Default version status: unknown

  • R37 to < *unaffected
  • R36 to < R36 P4affected
  • R32 to < R32 P6affected

F5 NGINX Open Source

Default version status: unaffected

  • 1.31.0 to < *unaffected
  • 1.19.0 to < 1.30.1affected

References