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    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.

    Published:Jul 20, 2026
    Last Modified:Jul 21, 2026
    EPS:Jul 20, 2026
    EPSS Score:0.00249
    CVSS Score:5.9

    Affected Products

    Vendor
    Axllent
    Product
    Mailpit

    Exploits

    https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4jhttps://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High