CVE-2026-75130: Uptash CONTEXT7

Critical severity, CVSS 9.0. EPSS: 0.5% chance of exploitation in the next 30 days.

Context7 through 2.1.2 contains a prompt injection vulnerability that allows attackers to execute malicious instructions in connected AI coding agents by injecting unsanitized content through the Custom AI Instructions feature served via the MCP server. Attackers can poison the custom instructions to exfiltrate credentials from environment files to an attacker-controlled service and perform destructive file deletion on the victim's machine when the agent makes a routine library documentation request.

Affected products

• Uptash CONTEXT7: up to and including 2.1.2

Published 2026-08-18. Last modified 2026-09-24.