RCE in Anysphere Cursor
CVE-2026-31854
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.003 (19.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Anysphere Cursor
- Cursor — versions < 2.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-31854?
- CVE-2026-31854 is a high-severity vulnerability in Anysphere Cursor, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-03-11.
- How severe is CVE-2026-31854?
- High severity. CVSS v3 base score is 8.8 out of 10.