Path Traversal in Ishayoyo Excel-Mcp
CVE-2026-10278
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (19.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Ishayoyo Excel-Mcp — versions 1.0.0, 1.0.1, 1.0.2
Weakness classification (CWE)
References
- vuldb.com/vuln/367571 (technical-description, vdb-entry)
- vuldb.com/vuln/367571/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-10278 (third-party-advisory)
- vuldb.com/submit/825418 (third-party-advisory)
- github.com/ishayoyo/excel-mcp/issues/6 (issue-tracking, exploit)
- github.com/ishayoyo/excel-mcp/ (product)
Frequently asked questions
- What is CVE-2026-10278?
- CVE-2026-10278 is a medium-severity vulnerability in Ishayoyo Excel-Mcp, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-06-01.
- How severe is CVE-2026-10278?
- Medium severity. CVSS v3 base score is 6.3 out of 10.