CVE-2026-40701
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| F5 | NGINX Plus | R37 < * | unaffected |
| F5 | NGINX Plus | R36 < R36 P4 | affected |
| F5 | NGINX Plus | R32 < R32 P6 | affected |
| F5 | NGINX Open Source | 1.31.0 < * | unaffected |
| F5 | NGINX Open Source | 1.19.0 < 1.30.1 | affected |
Weaknesses
- CWE-416: CWE-416 Use After Free
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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