rootpwn

critical · CVSS v3 9.8 · CVSS v4 8.4 · EPSS 0.00355

CVE-2026-97151

mammoth (aka mammoth.js) before 1.12.2 is vulnerable to prototype pollution when reading the styles defined in a documen…

Description

mammoth (aka mammoth.js) before 1.12.2 is vulnerable to prototype pollution when reading the styles defined in a document. Converting a crafted .docx file allows an attacker to add arbitrary properties to Object.prototype. In 1.11.0 through 1.12.1, applications that convert further documents in the same process and return the converted HTML can also disclose the contents of local server files (to the party supplying the documents) by setting externalFileAccess to true.

Scores

Severity
critical
CVSS v2
7.5
CVSS v3
9.8
CVSS v4
8.4
EPSS
0.00355

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