{"id":"EUVD-2026-63664","revision":"3b39c4b0230e4ef5a9c2b79da0a8114e","records":[{"revision":"3b39c4b0230e4ef5a9c2b79da0a8114e","observedAt":"2026-10-28T08:45:27.412+00:00","statement":{"source":"euvd","id":"EUVD-2026-63664","aliases":["CVE-2026-67447","GHSA-r553-m4fv-5v97"],"title":"Mailpit is an email testing tool and API for developers. From 1.30.0 until 1.30.5, Mailpit's internal/smtpd/smtpd.go readData() function calls bufio.Reader.ReadBytes before applying the len(data)+len(line) size check to the completed SMTP D…","description":"Mailpit is an email testing tool and API for developers. From 1.30.0 until 1.30.5, Mailpit's internal/smtpd/smtpd.go readData() function calls bufio.Reader.ReadBytes before applying the len(data)+len(line) size check to the completed SMTP DATA line against Server.MaxSize. An unauthenticated SMTP client can send a single line larger than the configured MaxMessageSize, causing the full line to be allocated before Mailpit returns the 552 5.3.4 rejection. This post-fix gap remains after normal multi-line DATA accumulation was bounded, and concurrent oversized lines can create substantial memory pressure beyond the configured message-size cap. This issue is fixed in version 1.30.5.","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:U/C:N/I:N/A:L","score":5.3,"severity":null}],"references":["https://github.com/axllent/mailpit/security/advisories/GHSA-r553-m4fv-5v97","https://github.com/axllent/mailpit/commit/8720c6bd8281fc00d458081908f1dbef8e59a98c","https://github.com/axllent/mailpit/releases/tag/v1.30.5"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63664","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 20, 2026, 9:15:06 PM","dateUpdated":"Aug 21, 2026, 4:19:21 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-2026-63664","identifiers":["EUVD-2026-63664","CVE-2026-67447","GHSA-r553-m4fv-5v97"]},"retained":false,"historicalAffected":[]}],"coverage":[]}