{"id":"GO-2025-4113","summary":"OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation in github.com/oauth2-proxy/oauth2-proxy","details":"OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation in github.com/oauth2-proxy/oauth2-proxy","aliases":["BIT-oauth2-proxy-2025-64484","CVE-2025-64484","GHSA-vjrc-mh2v-45x6"],"modified":"2026-03-03T04:57:36.731541Z","published":"2025-11-17T19:11:23Z","database_specific":{"review_status":"UNREVIEWED","url":"https://pkg.go.dev/vuln/GO-2025-4113"},"references":[{"type":"ADVISORY","url":"https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-vjrc-mh2v-45x6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64484"},{"type":"FIX","url":"https://github.com/oauth2-proxy/oauth2-proxy/commit/f3f30fa976fb4bb97d6345ba4735cb6d86e24f95"},{"type":"WEB","url":"https://datatracker.ietf.org/doc/html/rfc2616#section-4.2"},{"type":"WEB","url":"https://datatracker.ietf.org/doc/html/rfc822#section-3.2"},{"type":"WEB","url":"https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.13.0"},{"type":"WEB","url":"https://github.security.telekom.com/2020/05/smuggling-http-headers-through-reverse-proxies.html"},{"type":"WEB","url":"https://www.uptimia.com/questions/why-are-http-headers-with-underscores-dropped-by-nginx"}],"affected":[{"package":{"name":"github.com/oauth2-proxy/oauth2-proxy","ecosystem":"Go","purl":"pkg:golang/github.com/oauth2-proxy/oauth2-proxy"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2025-4113.json"}},{"package":{"name":"github.com/oauth2-proxy/oauth2-proxy/v7","ecosystem":"Go","purl":"pkg:golang/github.com/oauth2-proxy/oauth2-proxy/v7"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.13.0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2025-4113.json"}}],"schema_version":"1.7.3"}