CVE-2026-49217 PUBLISHED

Mailu missing authentication on PATCH /api/v1/token/<id>, which allows unauthenticated removal of IP restrictions

Assigner: GitHub_M
Reserved: 28.05.2026 Published: 20.08.2026 Updated: 20.08.2026

Mailu is a mail server as a set of Docker images. Prior to version 2024.06.52, a missing authorization check in the Mailu admin REST API allows any unauthenticated attacker to remove any potential IP restriction or update the comment field from any existing user token provided the REST API is enabled. Upgrade to Mailu 2024.06.52 to receive a patch or, as a workaround, turn the REST API off.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Mailu
Product	Mailu
Versions	Version < 2024.06.52 is affected

References

https://github.com/Mailu/Mailu/security/advisories/GHSA-2w8v-6xr5-g9gh

Problem Types

CWE-306: Missing Authentication for Critical Function CWE