CVEvulnerability

CVE-2026-42926

6.3 MEDIUM Published 2026-05-13 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-05-13
Last modified
2026-10-26
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.3 MEDIUM — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
5.8 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Weaknesses
CWE-172

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 configurations

• f5 nginx gateway fabric (>= 1.3.0 <= 1.6.2) • f5 nginx open source (>= 1.29.4 <= 1.30.0) • f5 nginx gateway fabric (>= 2.0.0 <= 2.6.0) • f5 nginx instance manager (>= 2.16.0 <= 2.22.0) • f5 nginx ingress controller (>= 3.5.0 <= 3.7.2) • f5 nginx ingress controller (>= 4.0.0 <= 4.0.1) • f5 nginx ingress controller (>= 5.0.0 <= 5.4.2)

Related

Weakness · CWE (1)

  • CWE-172 Improper Encoding or Decoding of Data weakness

References