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Advisory severityMedium6.9F5

Medium [CVE-2026-90439] NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module

This medium-severity F5 advisory covers CVE-2026-90439 affecting NGINX Plus, NGINX Open Source.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-90439 Source published Source updated

VulniPulse record published Record updated

CVE-2026-90439
Affected products & platforms
F5NGINX
Open source advisory

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Summary

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.

Affected versions
  • NGINX Plus 37.1.0.1 before 37.1.1.2
  • NGINX Plus 37.0.0.1 before 37.0.6.2
  • NGINX Open Source 1.29.2 before 1.31.6
  • NGINX Open Source 1.30.4 before 1.30.5

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Fixed versions
  • 37.1.1.2
  • 37.0.6.2
  • 1.31.6
  • 1.30.5

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Mitigation

Upgrade to a fixed release: 37.1.1.2, 37.0.6.2, 1.31.6, 1.30.5. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Discussion(0)

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