CVE-2026-1977 isaacwasserman mcp-vegalite-server visualize_data eval code injection
Remote attackers can execute arbitrary code via the visualize_data function in the mcp-vegalite-server library due to unsafe eval usage.
- 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-2026-1977?
CVE-2026-1977 is a medium-severity code injection vulnerability in isaacwasserman mcp-vegalite-server, published on 6 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-1977?
How do I fix CVE-2026-1977?
No fix has been published for CVE-2026-1977 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-1977 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1977 exists.
Sources
Also known as GHSA-rcq9-4v75-4fh5.