CVE-2026-42055: NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability
CSIRTS triage
- What
- A vulnerability in ngx_http_proxy_v2_module and ngx_http_grpc_module.
- Who is affected
- Users of NGINX with the affected modules.
- Urgency
- Remediation is urgent due to the high severity and potential for exploitation.
- Action
- Update NGINX to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42055
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Moderate exploitation riskCVE-2026-420553.5% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 88% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-42055 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [high] NGINX and NGINX Plus: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Microsoft Azure Linux (July 10, 2026)cert-fr-avis
- highDSA-6374-1 nginx - security updatedebian
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