RCE in Ryuzakishinji Biome-Mcp-Server
CVE-2026-3680
A security flaw has been discovered in RyuzakiShinji biome-mcp-server up to 1.0.0. Affected by this issue is some unknown functionality of the file biome-mcp-server.ts. Performing a manipulation results in command injection. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 335e1727147efeef011f1ff8b05dd751d8a660be. Applying a patch is the recommended action to fix this issue.
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: 0.018 (77.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.018 · change: +0.006
Affected products
- Ryuzakishinji Biome-Mcp-Server — versions 1.0
Weakness classification (CWE)
References
- vuldb.com/ (vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/RyuzakiShinji/biome-mcp-server/pull/1 (issue-tracking, patch)
- github.com/user-attachments/files/25466715/biome-mcp-server_security_advisory.p… (exploit)
- github.com/RyuzakiShinji/biome-mcp-server/pull/1/changes/335e1727147efeef011f1f… (issue-tracking, patch)
- github.com/RyuzakiShinji/biome-mcp-server/ (product)
Frequently asked questions
- What is CVE-2026-3680?
- CVE-2026-3680 is a medium-severity vulnerability in Ryuzakishinji Biome-Mcp-Server, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-07.
- How severe is CVE-2026-3680?
- Medium severity. CVSS v3 base score is 6.3 out of 10.