CVE-2025-66020
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductValibot
PublishedNov 26, 2025
First seenNov 26, 2025
Weakness typeCWE-1333CWE-1333
How to fix
Update
- valibot1.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| valibotnpm | 0.31.0 ≤ v < 1.2.0 | 1.2.0 |
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