NGINX ngx_http_proxy_v2_module vulnerability_CVE-2026-42926

5.8 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

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.

Basic Information

ID CVE-2026-42926

Source f5

Published May 13, 2026 at 14:12

Affected Product

Vendor F5

Product NGINX Open Source

Version 1.31.0

Affected Versions F5 NGINX Open Source 1.29.4

CWE Classification

CWE-172

References

my.f5.com /manage/s/article/K000161131

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    "published": "2026-05-13T14:12:45.695Z",
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