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.

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History

Wed, 13 May 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared F5
F5 nginx Open Source
Vendors & Products F5
F5 nginx Open Source

Wed, 13 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 13 May 2026 15:15:00 +0000

Type Values Removed Values Added
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.
Title NGINX ngx_http_proxy_v2_module vulnerability
Weaknesses CWE-172
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: f5

Published:

Updated: 2026-05-13T16:16:54.456Z

Reserved: 2026-05-05T21:19:09.531Z

Link: CVE-2026-42926

cve-icon Vulnrichment

Updated: 2026-05-13T16:06:25.462Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-13T16:16:49.640

Modified: 2026-05-13T16:27:11.127

Link: CVE-2026-42926

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T17:45:25Z

Weaknesses