What’s Vulnerable › Vulnerabilities

CVE-2026-54705: mathlive's Lack of Escaping of HTML allows for XSS

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-29 · updated 2026-10-24
• Weakness: CWE-116

Description

MathLive provides web components for math display and input. Prior to 0.110.0, MathLive fails to escape text-mode content in \text{} and \mbox{} commands in Box.toMarkup at src/core/box.ts, in xmlEscape, scanText, and text-mode output in src/formats/atom-to-math-ml.ts, and through convertLatexToMarkup, convertLatexToMathMl, <math-span>, <math-div>, and the default identity MathfieldElement.createHTML, allowing malicious input to run arbitrary JavaScript when rendered. This issue is fixed in version 0.110.0.

Affected products

• arnog mathlive: before 0.110.0

References

• https://github.com/arnog/mathlive/commit/5fe1c46153883f9ec0249a5c8c34e64aaae9cfb8
• https://github.com/arnog/mathlive/issues/3028
• https://github.com/arnog/mathlive/security/advisories/GHSA-fm7p-gw32-828p
• https://github.com/arnog/mathlive/security/advisories/GHSA-fm7p-gw32-828p

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