Regular Expression Denial of Service (ReDoS)

Overview mammoth is a Convert Word documents from docx to simple HTML and Markdown Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the style map tokeniser in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. Attackers can supp...

CVE-2026-105219

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...

CVE-2026-105219

Mammoth.js versions 1.3.0 before 1.12.3 are vulnerable to a Regular Expression Denial of Service (ReDoS) . The flaw exists in the style map tokeniser located in lib/styles/parser/tokeniser.js due to overlapping regex alternatives . An attacker can provide a crafted .docx file containing an unterm...

CVE-2026-105219 Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser

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...

CVE-2026-105219 Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser

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...

CVE-2026-105219 Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser

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...

EUVD-2026-92122

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...

CVE-2026-105219: Inefficient Regular Expression Complexity

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...

PT-2026-104648

Name of the Vulnerable Software and Affected Versions Mammoth.js versions 1.3.0 through 1.12.2 Description A regular expression denial of service occurs in the style map tokeniser located in lib/styles/parser/tokeniser.js due to overlapping regex alternatives. An attacker can provide a specially...