CVE-2026-7403 Details
Description
A security flaw has been discovered in geldata gel-mcp 0.1.0. This impacts the function list_rules/fetch_rule of the file src/gel_mcp/server.py. The manipulation of the argument rule_name results in path traversal. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
A path traversal vulnerability has been identified in Geldata's Gel-MCP version 0.1.0. The issue arises in the fetch_rule function within src/gel_mcp/server.py, where the rule_name argument is not properly validated. This flaw allows remote attackers to manipulate the input and access files outside the intended directory, leading to arbitrary file read. The vulnerability has been publicly disclosed and exploited.
Do not expose the fetch_rule tool to untrusted callers until the path validation issue is resolved. Consider serving only names returned by the list_rules() function and rejecting any input that contains path separators or traversal tokens. Additionally, run the service with limited file system privileges to prevent broad access to non-rule files.
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 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/geldata/gel-mcp/ | [email protected] | ProductSource CodeVendor |
| https://github.com/geldata/gel-mcp/issues/11 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://vuldb.com/submit/803530 | [email protected] | Permission Required |
| https://vuldb.com/vuln/360139 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/360139/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 |
|---|---|
| geldata gel-mcp | All versions |
CPE
Remediation
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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] |