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5.8 Medium

CVE-2026-42926 When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses…

Description

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products and versions

Product Affected versions Fixed in
NGINX Open Source 1.31 earliest → < 1.31.0 1.31.0
NGINX Open Source 1.29 1.29.4 → < 1.30.1 1.30.1

References

Timeline

  1. Published
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Other CVEs of NGINX Open Source

The 35 CVEs of NGINX Open Source →
CVE-2026-95101 Description NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module 5.3 Medium CVE-2026-93479 A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and the root… 8.1 High CVE-2026-97205 NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module 8.1 High CVE-2026-15176 A vulnerability exists in NGINX Plus and NGINX Open Source when a location is configured that uses the alias directive… 8.1 High
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