CVE-2026-10278 ishayoyo excel-mcp read_file/write_file index.ts path traversal
Remote attackers can exploit path traversal in the excel-mcp library to read or modify arbitrary files via manipulated file path arguments.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10278?
CVE-2026-10278 is a medium-severity path traversal vulnerability in ishayoyo excel-mcp, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in ishayoyo excel-mcp up to 1.0.2. Impacted is an unknown function of the file src/index.ts of the component read_file/write_file. Executing a manipulation of the argument filePath/outputPath can lead to path traversal. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. 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-2026-10278?
How do I fix CVE-2026-10278?
No fix has been published for CVE-2026-10278 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-2026-10278 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10278 exists.
Sources
Also known as GHSA-vgmg-2m2p-qqqj.