CVE-2026-7403 geldata gel-mcp server.py fetch_rule path traversal
Remote attackers can exploit path traversal in gel-mcp to read arbitrary files via the fetch_rule function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7403?
CVE-2026-7403 is a medium-severity path traversal vulnerability in geldata gel-mcp, published on 29 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-7403?
How do I fix CVE-2026-7403?
No fix has been published for CVE-2026-7403 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-7403 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7403 exists.
Sources
Also known as GHSA-fxc7-gvc5-xvx6.