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CVE-2026-42926

NGINX ngx_http_proxy_v2_module vulnerability

Published: May 13, 2026Updated: Jun 18, 2026 Sources: CVE List NVD BDUCWE-172
5.8MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 72.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-172

Affected Products

F5
commercial·US
nginx gateway fabricOn-premNetwork Device
Networking Infrastructure / load-balancer-proxy
NGINX Open SourceOn-premWeb App
Networking Infrastructure / load-balancer-proxy
nginx instance managerOn-prem
Networking Infrastructure / load-balancer-proxy
nginx ingress controllerOn-premNetwork Device
Networking Infrastructure / load-balancer-proxy
NGINX Inc.
commercial·USaka nginx plus, nginx, njs
NGINX Instance Manager
Networking Infrastructure
NGINX Gateway Fabric
Networking Infrastructure
NGINX Ingress Controller
Networking Infrastructure
NGINX Open Source
Networking Infrastructure
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
and 2 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
Is your org exposed to CVE-2026-42926?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://my.f5.com/manage/s/article/K000161131
my.f5.com
https://altsp.su/obnovleniya-bezopasnosti/
altsp.su
https://altsp.su/obnovleniya-bezopasnosti/
altsp.su
and 1 more references View all →

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