{"id":"CVE-2026-45713","revision":"e5750986c3604f3880ccfe4f97cf1216","records":[{"revision":"e5750986c3604f3880ccfe4f97cf1216","observedAt":"2026-10-25T12:17:14.897+00:00","statement":{"source":"nvd","id":"CVE-2026-45713","aliases":[],"title":"Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the Mailpit SMTP server has a Server.MaxSize int field that controls the maximum allowed DATA payload size, but the field is never assigned anywhere outside t…","description":"Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the Mailpit SMTP server has a Server.MaxSize int field that controls the maximum allowed DATA payload size, but the field is never assigned anywhere outside test code, leaving it at Go's zero value (0 ⇒ \"no limit\"). The same applies to the HTTP /api/v1/send endpoint, whose request body is decoded with json.NewDecoder(r.Body) and no http.MaxBytesReader. Because Mailpit's default listeners bind [::]:1025 (SMTP) and [::]:8025 (HTTP), with no authentication required on either, a single network-reachable attacker can push an arbitrarily large message into Mailpit and watch RAM consumption spike with a ~7-10× amplification factor (raw frame → enmime envelope tree → search-text index → zstd-encoded write to SQLite). Repeating the attack — or running it concurrently from multiple connections — drives the process to OOM-kill. Version 1.30.0 contains a patch.","state":0,"publishedAt":"2026-07-20T16:17:00.61+00:00","modifiedAt":"2026-10-24T20:10:00.137+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:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/axllent/mailpit/releases/tag/v1.30.0","https://github.com/axllent/mailpit/security/advisories/GHSA-fpxj-m5q8-fphw"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45713","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-400","CWE-770"],"productCriteria":["cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-07-20T16:17:00.610","lastModified":"2026-10-24T20:10:00.137"},"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-2026-45713","identifiers":["CVE-2026-45713"]},"retained":false,"historicalAffected":[]}],"coverage":[]}