CVE-2026-40701

published 2026-05-13

CVE-2026-40701: 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…

medium 6.3 CVSS 4.0

AV N AC L AT P PR N UI N VC L VI N VA L SC N SI N SA N E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

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

9 ranges

Vendor	Product	Version range	Fixed in
f5	nginx_open_source	>= 1.19.0 < 1.30.1	1.30.1
f5	nginx_plus	—	—
f5	nginx_plus	—	—
f5	nginx_plus	>= R32 < R32 P6	R32 P6
f5	nginx_plus	>= R36 < R36 P4	R36 P4
insights-proxy	insights-proxy-container-rhel9	—	—
nginx_1.24	nginx	—	—
nginx_1.26	nginx	—	—
ubuntu	nginx	—	—

CWE-416