{"cve":"CVE-2026-67448","nvd":{"published":"2026-08-20T22:17:56.870","modified":"2026-10-18T20:10:00.110","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-177","CWE-200","CWE-346"],"references":["https://github.com/axllent/mailpit/commit/fbe5e006c3f1682b819df58b4a932d7a84920be9","https://github.com/axllent/mailpit/releases/tag/v1.30.6","https://github.com/axllent/mailpit/security/advisories/GHSA-8r62-w5wh-fc5m"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-67448","score":0.00221,"percentile":0.125,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-8r62-w5wh-fc5m","url":"https://osv.dev/vulnerability/GHSA-8r62-w5wh-fc5m","summary":"Mailpit: WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689)","modified":"2026-09-02T23:45:04.677571004Z","packages":[{"ecosystem":"Go","name":"github.com/axllent/mailpit","purl":"pkg:golang/github.com/axllent/mailpit","ranges":[">=1.29.0 <1.30.6"],"fixed":["1.30.6"]}]},{"id":"GO-2026-6271","url":"https://osv.dev/vulnerability/GO-2026-6271","summary":"Mailpit: WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689) in github.com/axllent/mailpit","modified":"2026-08-26T01:19:26.047110565Z","packages":[{"ecosystem":"Go","name":"github.com/axllent/mailpit","purl":"pkg:golang/github.com/axllent/mailpit","ranges":[">=1.29.0 <1.30.6"],"fixed":["1.30.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}