NGINX ngx_http_proxy_v2_module vulnerability
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.3epss 0.3%
from disclosure to weapon24 days
Published on NVDMay 13
1st PoC+24d
exploitation probability
0.3%top 73% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Affected products
F5 · NGINX Open Sourcepublic PoCs found — 1
githubgithub.com/ikarolaborda/CVE2026-42926★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.