Vulnerability · Published Apr 29, 2026 · Assigned by VulDB

CVE-2026-7403geldata gel-mcp server.py fetch_rule path traversal

Medium 5.3

In plain English

A medium-severity path traversal in gel-mcp from geldata. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.6%top 53.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
geldata	gel-mcp	0.1.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

References

VDB-360139 | geldata gel-mcp server.py fetch_rule path traversal vdb-entry, technical-description
VDB-360139 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #803530 | geldata gel-mcp 0.1.0 Path Traversal third-party-advisory
https://github.com/geldata/gel-mcp/issues/11 exploit, issue-tracking
https://github.com/geldata/gel-mcp/ product