CVE-2025-66020: Open-Circle Valibot

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Valibot helps validate data using a schema. In versions from 0.31.0 to 1.1.0, the EMOJI_REGEX used in the emoji action is vulnerable to a Regular Expression Denial of Service (ReDoS) attack. A short, maliciously crafted string (e.g., <100 characters) can cause the regex engine to consume excessive CPU time (minutes), leading to a Denial of Service (DoS) for the application. This issue has been patched in version 1.2.0.

Affected products

• Open-Circle Valibot: from 0.31.0, before 1.2.0 (fixed in 1.2.0)

Published 2025-11-26. Last modified 2026-06-17.