CVE-2026-55149 Vouch Proxy: Unbounded Multipart Cookie Allocation DoS

Vouch Proxy is an SSO and OAuth/OIDC login solution for Nginx using the authrequest module. Prior to 0.48.0, Cookie in pkg/cookie/cookie.go parses the total part count from an attacker-controlled multipart cookie name and passes the value to makestring, numParts without checking that the value is...

PT-2026-80760

Name of the Vulnerable Software and Affected Versions vouch-proxy version 0.47.2 Description An unauthenticated remote denial-of-service issue exists in the multipart cookie reassembly logic. The /validate and / external-auth-:id endpoints parse the total cookie part count directly from the cooki...