CVE-2025-66020
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.33%
- CWE
- CWE-1333
- Published
- 2025-11-26
- Last modified
- 2026-03-13
Affected products
- open-circle valibot
Weakness type
Related vulnerabilities
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- CVE-2026-86081 — n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path
- CVE-2026-85062 — Colord: Slow rejection of oversized malformed color strings
- CVE-2026-83619 — xmldom: End-tag Whitespace-Trim Regex ReDoS — quadratic backtracking in the 0.8.x end-tag parser
- CVE-2026-83606 — xmldom PI grammar regex ReDoS: quadratic backtracking on unterminated processing instructions
- CVE-2024-58379 — nodemailer before 6.9.9 ReDoS via attachDataUrls parameter
- CVE-2026-55520 — Protego: Exponential backtracking ReDoS in robots.txt URL wildcard matching