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CVE-2026-42926

CVE-2026-42926 · NGINX ngx_http_proxy_v2_module vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: system · web

Affected products and versions

  • nginx

    Versions
    • ≥ 1.31.0: Not affected (semver)
    • ≥ 1.29.4, < 1.30.1: Affected (semver)

    Update to 1.30.1

  • nginx Debian:14

    Versions
    • 1.26.3-3
    • 1.28.0-1
    • 1.28.0-2
    • 1.28.0-3
    • 1.28.0-4
    • 1.28.0-5
    • 1.28.0-6
    • 1.28.1-1
    • 1.28.1-2
    • 1.28.1-3
    • 1.28.2-1
    • 1.28.2-2
    • 1.28.2-3
    • 1.28.2-4
    • 1.28.3-1
    • 1.28.3-2
    • 1.30.0-1
    • 1.30.0-2
    • 1.30.0-3
    Affected ranges
    • ECOSYSTEM: < 1.30.0-4

    Update to 1.30.0-4

Original sources

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