CVE-2026-90439

mediumCVSS 6.5covered by 1 sourcefirst seen 2026-09-15

NGINX 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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Advisory coverage (1)

mediumCVE-2026-90439: NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When u…nvd · 2026-09-15

External references

NVD record for CVE-2026-90439

CVE.org record

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