CVE-2026-7386 Details
Description
A flaw has been found in fatbobman mail-mcp-bridge up to 1.3.3. Affected is an unknown function of the file src/mail_mcp_server.py. Executing a manipulation of the argument message_ids can lead to path traversal. The attack can be executed remotely. The exploit has been published and may be used. Upgrading to version 1.3.4 is able to address this issue. This patch is called 638b162b26532e32fa8d8047f638537dbdfe197a. Upgrading the affected component is recommended.
A path traversal vulnerability has been identified in fatbobman mail-mcp-bridge versions through 1.3.3. The issue resides in an unknown function within the file src/mail_mcp_server.py. By manipulating the argument message_ids, it is possible to traverse paths and delete directories outside the intended attachment cache root. This vulnerability can be exploited remotely. The extraction flow in extract_attachments.py also contains the same unsafe message_id-to-directory joining behavior, but the cleanup tool provides a more straightforward exploitation path by allowing the deletion of arbitrary directories.
Users are advised to upgrade to version 1.3.4, which addresses the vulnerability by normalizing Message-ID values, preventing directory traversal, and adding regression tests. The updated version is available on the fatbobman mail-mcp-bridge GitHub releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 29, 2026CISA-ADP
Assessed Apr 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/fatbobman/mail-mcp-bridge/ | [email protected] | ProductVendor |
| https://github.com/fatbobman/mail-mcp-bridge/commit/638b162b26532e32fa8d8047f638537dbdfe197a | [email protected] | Source CodeVendor |
| https://github.com/fatbobman/mail-mcp-bridge/issues/2 | [email protected] | ExploitIssue TrackingTechnical AnalysisVendor |
| https://github.com/fatbobman/mail-mcp-bridge/releases/tag/1.3.4 | [email protected] | Release NotesVendor |
| https://vuldb.com/submit/803096 | [email protected] | Permission Required |
| https://vuldb.com/vuln/360107 | [email protected] | AdvisoryPermission RequiredRemedy |
| https://vuldb.com/vuln/360107/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| fatbobman mail-mcp-bridge | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | New CVE Received | [email protected] |