{"id":"CVE-2026-67446","revision":"af55ea3835f145479cc3cf14b903e4ac","records":[{"revision":"af55ea3835f145479cc3cf14b903e4ac","observedAt":"2026-10-25T15:18:51.467+00:00","statement":{"source":"nvd","id":"CVE-2026-67446","aliases":[],"title":"Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit decodes attacker-supplied image attachments into a full raster before checking decoded dimensions, pixel count, or memory use in the GET /api/v1/message/{id}/…","description":"Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit decodes attacker-supplied image attachments into a full raster before checking decoded dimensions, pixel count, or memory use in the GET /api/v1/message/{id}/part/{partID}/thumb endpoint. The Thumbnail handler in server/apiv1/thumbnails.go obtains attachment bytes through storage.GetAttachmentPart(), accepts image/* content, and calls imaging.Decode() with AutoOrientation before imaging.Fill() scales the image to 180 by 120 pixels. A compact image declaring very large dimensions can therefore consume disproportionately large memory and CPU, and opening the message UI can trigger the same endpoint through server/ui-src/components/message/MessageAttachments.vue. This can degrade availability when an unauthenticated client can store the crafted attachment and reach the web API. This issue is fixed in version 1.30.4.","state":0,"publishedAt":"2026-08-20T21:17:07.26+00:00","modifiedAt":"2026-10-18T20:10:00.11+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/axllent/mailpit/commit/6bcb6337838b542d53c348e38c7977f569b6db35","https://github.com/axllent/mailpit/releases/tag/v1.30.4","https://github.com/axllent/mailpit/security/advisories/GHSA-75mr-qw9x-3r39"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67446","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-400","CWE-770"],"productCriteria":[],"sourceDates":{"published":"2026-08-20T21:17:07.260","lastModified":"2026-10-18T20:10:00.110"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-67446","identifiers":["CVE-2026-67446"]},"retained":false,"historicalAffected":[]}],"coverage":[]}