{"schemaVersion":3,"id":"CVE-2026-67448","aliases":["GHSA-8r62-w5wh-fc5m","GO-2026-6271"],"status":"published","duplicateOf":null,"title":null,"description":"Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures websocket.Upgrader.CheckOrigin to return true. A malicious website can request /%61pi/events, skip corsOriginAccessControl(), reach the /api/events WebSocket handler, and receive live message IDs, Message-Id values, sender and recipient fields, subjects, tags, and body snippets from an unauthenticated default Mailpit instance after the user visits the site. This is a regression of the earlier WebSocket origin protection and does not affect deployments protected by --ui-auth-file. 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MISC","WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67448","label":"nvd.nist.gov/vuln/detail/CVE-2026-67448","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/axllent/mailpit","label":"github.com/axllent/mailpit","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21761-1","SUSE-SU-2026:23625-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21761-1","SUSE-SU-2026:23625-1"]},"timeline":[{"kind":"published","date":"2026-08-20T21:29:06.185Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-21T11:31:27.439Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T20:56:43.337Z","stale":false,"partial":false}}