BaselineWatch
Desk
Your fleet and your work Fleetyour releases and the hardware they run onTriagewhat needs a decisionWatchlistthe products and platforms you runSaved searchesthe lists you come back to
This instance Sourceswhat is read, how often, under what termsDigestthe daily or weekly summary, and alerts
How it is drawn Appearancethe look and the colour schemeBrandingthe mark this instance wears
Owner sign-in

CVE-2026-40701

6.3 medium exploit SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Public exploits 1

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.3 · f5NVD modified 2026-10-26 17:10

Affected (CPE criteria) 8

  • cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*
  • cpe:2.3:a:f5:dos:4.8.0:*:*:*:*:nginx:*:*
  • cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*
  • cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*
  • cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*
  • cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*
  • cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*
  • cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*

References 1