{"id":"EUVD-2026-43052","revision":"1cc6f1fd2f1c497d88e868d3f6882a2a","records":[{"revision":"1cc6f1fd2f1c497d88e868d3f6882a2a","observedAt":"2026-11-05T11:45:01.251+00:00","statement":{"source":"euvd","id":"EUVD-2026-43052","aliases":["CVE-2026-55187","GHSA-w4mc-hhc6-xp28"],"title":"Mailpit is an email testing tool and API for developers. Prior to 1.30.2, the remediation shipped for CVE-2026-27808 is incomplete because the tools.IsInternalIP deny-list in internal/tools/net.go relies on Go's standard library classificat…","description":"Mailpit is an email testing tool and API for developers. Prior to 1.30.2, the remediation shipped for CVE-2026-27808 is incomplete because the tools.IsInternalIP deny-list in internal/tools/net.go relies on Go's standard library classification helpers and does not block IPv6 transition mechanisms or prefixes such as NAT64, 6to4, IPv4-compatible IPv6, ISATAP, fec0::/10, and 2001:db8::/32. An attacker who can deliver email and invoke POST /api/v1/message/{ID}/link-check can coerce the Link Check API's safeDialContext path into dialing internal destinations and can use status-code and error feedback to map internal service reachability, including cloud metadata endpoints. This issue is fixed in version 1.30.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","score":5.8,"severity":null}],"references":["https://github.com/axllent/mailpit/security/advisories/GHSA-w4mc-hhc6-xp28","https://github.com/axllent/mailpit/commit/a88dadbbe1df016a35a445089ef2a362a6c2de78","https://github.com/axllent/mailpit/releases/tag/v1.30.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-43052","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 10, 2026, 9:43:59 PM","dateUpdated":"Jul 13, 2026, 3:55:15 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-43052","identifiers":["EUVD-2026-43052","CVE-2026-55187","GHSA-w4mc-hhc6-xp28"]},"retained":false,"historicalAffected":[]}],"coverage":[]}