{"apiVersion":"1.0","identifier":"CVE-2026-67448","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. This issue is fixed in version 1.30.6.","publishedAt":"2026-08-20T22:17:56","lastModifiedAt":"2026-08-21T12:16:30","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67448","cvssScore":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","epssProbability":0.00146,"riskScore":0.66,"affectedProduct":"Mailpit","affectedVersions":">=1.29.0,<1.30.6","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-67448","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-67448","en":"https://www.redsauce.net/en/cves/CVE-2026-67448","fr":"https://www.redsauce.net/fr/cves/CVE-2026-67448","pt":"https://www.redsauce.net/pt/cves/CVE-2026-67448","de":"https://www.redsauce.net/de/cves/CVE-2026-67448","sk":"https://www.redsauce.net/sk/cves/CVE-2026-67448","el":"https://www.redsauce.net/el/cves/CVE-2026-67448"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-67448"}}