CVE-2026-45711

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/axllent/mailpit/releases/tag/v1.30.0
https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j
https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j

Configurations

No configuration.

History

21 Jul 2026, 16:17

Type	Values Removed	Values Added
References	~~() https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j -~~	() https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j -

20 Jul 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-20 16:17

Updated : 2026-07-21 16:17

NVD link : CVE-2026-45711

Mitre link : CVE-2026-45711

CVE.ORG link : CVE-2026-45711

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-829

Inclusion of Functionality from Untrusted Control Sphere

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