NGINX ngx_http_ssl_module vulnerability_CVE-2026-40701

4.8 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

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.

Basic Information

ID CVE-2026-40701

Source f5

Published May 13, 2026 at 14:12

Affected Product

Vendor F5

Product NGINX Plus

Version R37

Affected Versions F5 NGINX Plus R36
F5 NGINX Plus R32
F5 NGINX Open Source 1.19.0

CWE Classification

CWE-416

References

my.f5.com /manage/s/article/K000161021

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