# CVE-2025-66020

## Summary

- **CVE ID:** CVE-2025-66020
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-1333
- **Published:** Nov 26, 2025
- **Last Modified:** Mar 13, 2026

## Description

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 (>= 0.31.0, < 1.2.0)

## References

- [CNA](https://github.com/open-circle/valibot/security/advisories/GHSA-vqpr-j7v3-hqw9)
- [CNA](https://github.com/open-circle/valibot/commit/cfb799db301a953a0950d5c05a34a3ab121262dc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 26.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._