synced 3 MIN AGO
01 Record

CVE-2021-3807

Inefficient Regular Expression Complexity in chalk/ansi-regex

HighPUBLISHEDCNA: @huntrdev
CNA base score7.5 CVSS v3.xCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

Inefficient Regular Expression Complexity in chalk/ansi-regex

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
3.55% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 88.7% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-08.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-09-17 00:00Z5 YR AGO
Last updated
2026-10-08 21:14Z20 DAYS AGO
Reserved
2021-09-16
Assigning CNA
@huntrdev
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-1333Inefficient Regular Expression ComplexityBase
  • CWE-400Uncontrolled Resource ConsumptionClass
Data version
5.2
Document digest
b410b0ff89a897efca4d9f29eb8374329430b057dfbe52e8d0d8f2cb4a81094c

05 Affected products

VendorProductVersionsPlatforms
chalkchalk/ansi-regex< 6.0.1, < 5.0.1—

06 References

07 Fixed in

AlmaLinux 8

  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2.0.15-1.module_el8.5.0+2605+45d748af
    • Affected before 2.0.15-1.module_el8.5.0+2618+8d46dafd
    • Affected before 2.0.15-1.module_el8.6.0+2904+f21ad6f4
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 23-3.module_el8.4.0+2522+3bd42762
    • Affected before 23-3.module_el8.5.0+2618+8d46dafd
    • Affected before 25-1.module_el8.5.0+246+05401605
    • Affected before 25-1.module_el8.5.0+2605+45d748af
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+254+b4526b16
    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+246+05401605
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+2605+45d748af

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • nodejs
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-docs
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-full-i18n
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-libs
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-nodemon
    Fixed in 2.0.19-1.el9_0
  • npm
    Fixed in 1:8.11.0-1.16.16.0.1.el9_0

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2.0.15-1.module_el8.5.0+2605+45d748af
    • Affected before 2.0.15-1.module_el8.5.0+2618+8d46dafd
    • Affected before 2.0.15-1.module_el8.6.0+2904+f21ad6f4
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 23-3.module_el8.4.0+2522+3bd42762
    • Affected before 23-3.module_el8.5.0+2618+8d46dafd
    • Affected before 25-1.module_el8.5.0+246+05401605
    • Affected before 25-1.module_el8.5.0+2605+45d748af
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+254+b4526b16
    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+246+05401605
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+2605+45d748af

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • nodejs
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-docs
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-full-i18n
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-libs
    Fixed in 1:16.16.0-1.el9_0
  • nodejs-nodemon
    Fixed in 2.0.19-1.el9_0
  • npm
    Fixed in 1:8.11.0-1.16.16.0.1.el9_0

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • node-ansi-regex
    Fixed in 5.0.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • node-ansi-regex
    Fixed in 5.0.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • node-ansi-regex
    Fixed in 5.0.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • node-ansi-regex
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.