# CVE-2025-66020: Valibot has a ReDoS vulnerability in `EMOJI_REGEX`

> CVE-2025-66020: Valibot has a ReDoS vulnerability in `EMOJI_REGEX`. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-66020
Last updated: 2026-10-23T22:10:00Z

- Published: 2025-11-26 01:49 UTC · Updated: 2026-10-23 22:10 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.33%, 26th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1333

## 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 vendors and products

- open-circle: valibot

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-66020)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-66020)
- [https://github.com/open-circle/valibot/commit/cfb799db301a953a0950d5c05a34a3ab121262dc](https://github.com/open-circle/valibot/commit/cfb799db301a953a0950d5c05a34a3ab121262dc)
- [https://github.com/open-circle/valibot/security/advisories/GHSA-vqpr-j7v3-hqw9](https://github.com/open-circle/valibot/security/advisories/GHSA-vqpr-j7v3-hqw9)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-66020 · Markdown: https://rewindex.com/cve/CVE-2025-66020.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-66020 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:50:27.265Z