23 Oct 2026 15:48:27 UTC
NGINX ngx_http_v3_module vulnerability
cve-program · CVE-2026-90439 · Published
CVE-2026-90439
NGINX ngx_http_v3_module vulnerability
CVSS 3.1 6.5 MEDIUMCVSS 4.0 6.9 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-90439
PublishedNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
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