PT-2025-48121 · Valibot+1 · Valibot+1

CVE-2025-66020 · Published 2025-11-26 · Updated 2026-04-21

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Valibot versions 0.31.0 through 1.1.0

Description Valibot is a data validation library that utilizes schemas. Versions from 0.31.0 to 1.1.0 contain a Regular Expression Denial of Service (ReDoS) issue within the EMOJI REGEX used in the emoji action. A specially crafted, short string (less than 100 characters) can cause the regular expression engine to consume excessive CPU time, potentially leading to a Denial of Service (DoS) condition for the application.

Recommendations Update to version 1.2.0 or later.

Exploit

Fix

DoS

Weakness Enumeration

CWE-1333

Related Identifiers

CVE-2025-66020

GHSA-VQPR-J7V3-HQW9

Affected Products

Confluence

Valibot

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66020.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-66020 · Security Note
• https://osv.dev/vulnerability/CVE-2025-66020 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-66020 · Security Note
• https://github.com/open-circle/valibot/commit/cfb799db301a953a0950d5c05a34a3ab121262dc · Note
• https://github.com/open-circle/valibot/security/advisories/GHSA-vqpr-j7v3-hqw9 · Note
• https://twitter.com/cracbot/status/1995447836943814660 · Twitter Post
• https://t.me/CVEtracker/38261 · Telegram Post
• https://jira.atlassian.com/browse/CONFSERVER-103476 · Note