CVE-2026-42926
MEDIUM EPSS 25.8%
Published May 13, 20261mo ago · Modified Jun 18, 20261w ago
6.3 CVSS 4.0
Published May 13, 2026 1mo ago
Last Modified Jun 18, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
25.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-172
Affected Products 7
| Vendor | Product | Version | Range |
|---|---|---|---|
| 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 |
References 1
- my.f5.com https://my.f5.com/manage/s/article/K000161131
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.