CVE-2026-45713
- Source
- https://cve.org/CVERecord?id=CVE-2026-45713
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45713.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-45713
- Aliases
- Downstream
- Related
- Published
- 2026-07-20T15:01:01.489Z
- Modified
- 2026-08-07T11:51:12.909706787Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Mailpit: Unauthenticated remote memory-exhaustion DoS via unlimited SMTP DATA and /api/v1/send body sizes
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45713.json", "cwe_ids": [ "CWE-400", "CWE-770" ] }- References
Affected packages
Git / github.com/axllent/mailpit
Affected ranges
- Type
- GIT
- Repo
- https://github.com/axllent/mailpit
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "1.30.0" } ], "source": [ "AFFECTED_FIELD", "CPE_RANGE", "REFERENCES" ] }