CVE Catalog

CVE-2026-105219

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.36%

27th percentile - higher than 27% of all known CVEs

Summary

Mammoth.js 1.3.0 before 1.12.3 contains a regular expression denial of service vulnerability in the style map tokeniser in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. Attackers can supply a crafted .docx with an unterminated quoted string of repeated backslash escapes in mammoth/style-map to block the Node.js event loop.

Risk Assessment

The organization is at risk of DoS attacks that can block Node.js-based applications, leading to service unavailability and operational disruption.

Recommendation

Update Mammoth.js to version 1.12.3 or later, which includes the ReDoS fix.

Related vulnerabilities

Original NVD description (English source)

Mammoth.js 1.3.0 before 1.12.3 contains a regular expression denial of service vulnerability in the style map tokeniser in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. Attackers can supply a crafted .docx with an unterminated quoted string of repeated backslash escapes in mammoth/style-map to block the Node.js event loop.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS