High

MathJax Regular expression Denial of Service (ReDoS)

  • Disclosed: 29.08.2023
  • Updated: 11.10.2026 10:22

Mathjax up to v2.7.9 was discovered to contain two Regular expression Denial of Service (ReDoS) vulnerabilities in MathJax.js via the components pattern and markdownPattern. NOTE: the vendor disputes this because the regular expressions are not applied to user input; thus, there is no risk.

Affected software

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PlatformPackageVulnerable versionsFixed in
npm package mathjax <= 2.7.9 no fix

References

CVSS score 7.5/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-1333
Platform
npm
Package
mathjax
Disclosed
29.08.2023
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-v638-q856-grg8 - CC BY 4.0

Vulnerability history: mathjax

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
2
First → latest
07.2018 08.2023
Without a fix
1
Exploited in attacks
0

Severity breakdown

  • High 1
  • Medium 1

Disclosures per year

  1. 2018: 1
  2. 2019: 0
  3. 2020: 0
  4. 2021: 0
  5. 2022: 0
  6. 2023: 1
  7. 2024: 0
  8. 2025: 0
  9. 2026: 0
  1. MathJax Regular expression Denial of Service (ReDoS) this entry
    High · 7.5 CVE-2023-39663 <= 2.7.9 no fix
  2. Medium · 5.4 CVE-2018-1999024 < 2.7.4 2.7.4

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