Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-3807

CVE-2021-3807HIGH

chalk chalk/ansi-regex — Inefficient Regular Expression Complexity in chalk/ansi-regex

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0355   89.2     —

AFFECTED
  Product           Versions       Fixed
  chalk/ansi-regex  unspecified –  5.0.1

TIMELINE
  Sep 16  Reserved by @huntrdev
  Sep 17  Published (CNA: @huntrdev)
  Oct 8   EXPLOIT PUBLISHED — CVE-2021-3807 (chalk/ansi-regex). Public exploit reference added.

CWE-1333 · CNA: @huntrdev · CVSS v3.1 · 4 references · NVD status: Modified

Description

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 16, 2021	Reserved	Reserved by @huntrdev
September 17, 2021	Published	Published (CNA: @huntrdev)
October 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2021-3807 (chalk/ansi-regex). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
chalk	chalk/ansi-regex	—	unspecified	5.0.1

Weaknesses

CWE-1333

References (4)

https://github.com/chalk/ansi-regex/commit/8d1d7cdb586269882c4bdc1b7325d0c58c8f76f9 [Patch, Third Party Advisory]
https://huntr.dev/bounties/5b3cf33b-ede0-4398-9974-800876dfd994 [Exploit, Issue Tracking, Patch, Third Party Advisory]
https://security.netapp.com/advisory/ntap-20221014-0002/ [Third Party Advisory]
https://www.oracle.com/security-alerts/cpuapr2022.html [Patch, Third Party Advisory]

Authoritative record: CVE-2021-3807 at cve.org

Vendors: chalk

Weaknesses: CWE-1333

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-3807 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.