Security Advisory

CVE-2026-40701

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-13 14:12:43

Last updated 2026-05-13 16:07:37

Assigner f5

CVSS score 4.8

State PUBLISHED

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.

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