CVE-2026-40701
Published: May 13, 2026
Modified: May 13, 2026
CVSS v3.1
4.8
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.
| Vendor | Product | Versions |
|---|---|---|
F5 | NGINX Plus | unaffected R37 - < *affected R36 - < R36 P4affected R32 - < R32 P6 |
F5 | NGINX Open Source | unaffected 1.31.0 - < *affected 1.19.0 - < 1.30.1 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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