---
id: "CVE-2026-106763"
kind: "vulnerability"
aliases: ["CVE-2026-106763"]
title: "SageMath MCP server: shell escaping flaw lets remote attackers run code"
severity: "high"
cvss: 7.5
epss: 0.00699
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "mcp", "node", "npm", "sagemath"]
not_affected_if: ["package-not-installed"]
published_at: "2026-10-23T15:17:23+00:00"
first_seen_at: "2026-10-23T21:57:34+00:00"
updated_at: "2026-10-25T12:38:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106763", "first_seen_at": "2026-10-23T21:57:34+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-106763", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# SageMath MCP server: shell escaping flaw lets remote attackers run code

The @justice8096/sagemath-mcp-server 1.0.1 npm package has a flaw in its escapeShellString and sanitizeCode functions that lets a remote attacker execute arbitrary code. The sources do not say whether the attacker needs any prior access or what input path reaches those functions.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `npm ls @justice8096/sagemath-mcp-server` in each project to see whether version `1.0.1` is installed
- Check whether the server is exposed to any network the attacker can reach, which the sources do not confirm

## Fix

- Upgrade `@justice8096/sagemath-mcp-server` past `1.0.1`; the sources do not name a fixed version
- Remove the package if no fixed release is available

## Timeline

- 2026-10-23T21:57:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-106763
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-106763

## From the sources

An issue in @justice8096/sagemath-mcp-server 1.0.1 allows a remote attacker to execute arbitrary code via the escapeShellString and sanitizeCode functions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_