RCE in Isaacwasserman Mcp-Vegalite-Server
CVE-2026-1977
A security vulnerability has been detected in isaacwasserman mcp-vegalite-server up to 16aefed598b8cd897b78e99b907f6e2984572c61. Affected by this vulnerability is the function eval of the component visualize_data. Such manipulation of the argument vegalite_specification leads to code injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The project was informed of the problem early through an issue report but has not responded yet.
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: 0.002 (13.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Isaacwasserman Mcp-Vegalite-Server — versions 16aefed598b8cd897b78e99b907f6e2984572c61
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/isaacwasserman/mcp-vegalite-server/issues/9 (issue-tracking, exploit)
- github.com/isaacwasserman/mcp-vegalite-server/ (product)
Frequently asked questions
- What is CVE-2026-1977?
- CVE-2026-1977 is a medium-severity vulnerability in Isaacwasserman Mcp-Vegalite-Server, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-02-06.
- How severe is CVE-2026-1977?
- Medium severity. CVSS v3 base score is 6.3 out of 10.