Code Injection Vulnerability in mcp-vegalite-server by Isaac Wasserman
CVE-2026-1977

5.3MEDIUM

Key Information:

Vendor

Isaacwasserman

Status
Mcp-vegalite-server
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1977?

A security vulnerability has been identified in the mcp-vegalite-server, specifically within the visualize_data function due to improper handling of the vegalite_specification argument. This flaw permits attackers to execute arbitrary code remotely, posing a significant threat to users of the affected versions. Despite being reported, the project maintainers have yet to address this critical issue, making it imperative for users to be aware and take precautionary measures.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

mcp-vegalite-server 16aefed598b8cd897b78e99b907f6e2984572c61

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1977 - Proof of Concept

References

https://vuldb.com/?id.344499
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344499
signaturepermissions-required
https://vuldb.com/?submit.743246
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lexpl0it (VulDB User)
JSON
.