Mailu missing authentication on PATCH /api/v1/token/<id>, which allows unauthenticated removal of IP restrictions (CVE-2026-49217) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-49217

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

Answer in brief

CVE-2026-49217 records a Unknown severity vulnerability in Mailu missing authentication on PATCH /api/v1/token/<id>, which allows unauthenticated removal of IP restrictions. The current sources do not mark it as known exploited. The current feed maps Mailu/Mailu (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 20, 2026Updated Aug 20, 2026Source checked Aug 21, 2026First seen by HOL Aug 20, 2026Material review Aug 20, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Mailu/Mailu (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Mailu/Mailugeneric	< 2024.06.52	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Mailu/Mailu.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 20, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.