← Vulnerability feed

Vulnerability record · CVE-2026-45711 · published 20 July 2026

CVE-2026-45711: Axllent mailpit path traversal vulnerability

Axllent · Mailpit

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.

8.2 CVSS 3.1 High EPSS 0.39% · top 69.6% CWE-22 · Path traversalCWE-829 · Inclusion from untrusted sphere
8.2CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
28 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/axllent/mailpit/releases/tag/v1.30.0 Release Notes
https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j ExploitVendor Advisory
https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j ExploitVendor Advisory

Track CVE-2026-45711 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.6CVE-2026-27808Axllent mailpit server-side request forgery (ssrf) vulnerabilityMailpit is an email testing tool and API for developers. Prior to version 1.29.2, the Link Check API (/api/v1/message/{ID}/link-check) is vulnerable …EPSS 0.56%7.5CVE-2026-45713Axllent mailpit uncontrolled resource consumption vulnerabilityMailpit 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 control…EPSS 0.61%7.5CVE-2026-23845Axllent mailpit server-side request forgery (ssrf) vulnerabilityMailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery (SSRF) via HTML Check…EPSS 0.44%6.5CVE-2026-22689Axllent mailpit vulnerabilityMailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections fr…EPSS 0.24%5.9CVE-2026-45712Axllent mailpit race condition vulnerabilityMailpit is an email testing tool and API for developers. Prior to version 1.30.0, the screenshot/print proxy (/proxy?data=…) maintains a package-leve…EPSS 0.34%5.8CVE-2026-45709Axllent mailpit server-side request forgery (ssrf) vulnerabilityMailpit is an email testing tool and API for developers. The fix for GHSA-6jxm-fv7w-rw5j (CVE-2026-23845, "Server-Side Request Forgery (SSRF) via HTM…EPSS 0.32%5.3CVE-2026-48824Axllent mailpit allocation without limits vulnerabilityMailpit is an email testing tool and API for developers. Prior to version 1.30.1, the fix for GHSA-fpxj-m5q8-fphw (CVE-2026-45710, "Mailpit: Set a de…EPSS 0.54%5.3CVE-2026-23829Axllent mailpit vulnerabilityMailpit is an email testing tool and API for developers. Prior to version 1.28.3, Mailpit's SMTP server is vulnerable to Header Injection due to an i…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2026-45711), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.