Dashboard / CVE-2026-42926

CVE-2026-42926

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 73/100
Published: 2026-05-13 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: Present
VC: None
VI: None
VA: None

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.

Weakness Classification (1)

Affected Software (7)

VendorProductVersion
f5 nginx_gateway_fabric 1.3.0 – 1.6.2
f5 nginx_gateway_fabric 2.0.0 – 2.6.0
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
f5 nginx_instance_manager 2.16.0 – 2.22.0
f5 nginx_open_source 1.29.4 – 1.30.0

References & Advisories (1)

Bug Bounty Relevance

73 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.3 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.35%
Raw Score 0.003460
Percentile 28.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00346
2026-10-28
0.00346

Intelligence Sources

nvd ref →

External Links