Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
axllent mailpit — Mailpit: Path traversal & arbitrary file write in mailpit dump --http via attacker-controlled message IDs
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N H L 8.2 .0031 23.9 —
AFFECTED
Product Versions Fixed
mailpit < 1.30.0 – —
TIMELINE
May 13 Reserved by GitHub_M
Jul 20 EXPLOIT PUBLISHED — CVE-2026-45711 (axllent mailpit). Public exploit reference added.
Jul 20 Published (CNA: GitHub_M)
Jul 28 EXPLOIT PUBLISHED — CVE-2026-45711 (axllent mailpit). Public exploit reference added.
Description
Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the mailpit dump --http <base-url> <out-dir> sub-command downloads every message from a remote Mailpit instance and writes each one as <id>.eml inside the user-supplied output directory. The message ID field is taken verbatim from the JSON response of the remote server and concatenated into the output path with path.Join, which silently normalizes `..` segments. A malicious HTTP server impersonating Mailpit can therefore make mailpit dump write attacker-controlled bytes to any path the running user can write, fully outside the intended output directory. Version 1.30.0 contains a patch.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| May 13, 2026 | Reserved | Reserved by GitHub_M |
| July 20, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-45711 (axllent mailpit). Public exploit reference added. |
| July 20, 2026 | Published | Published (CNA: GitHub_M) |
| July 28, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-45711 (axllent mailpit). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| axllent | mailpit | — | < 1.30.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-45711 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.