Answer in brief
CVE-2026-105219 records a High severity (CVSS 8.7) vulnerability in Mammoth.js 1.3.0 before 1.12.3 ReDoS via Style Map Tokeniser. The current sources do not mark it as known exploited. The current feed maps mwilliamson/mammoth.js (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps mwilliamson/mammoth.js (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mwilliamson/mammoth.jsgeneric | >=1.3.0 <1.12.3 | 1.12.3 |
Published upstream
Oct 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.