CVE-2026-97151
HIGH
8,4
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
Description
AI Translation Available
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.
1321
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
IncompleteCommon Consequences
Security Scopes Affected:
Confidentiality
Integrity
Availability
Potential Impacts:
Read Application Data
Modify Application Data
Dos: Crash, Exit, Or Restart
Applicable Platforms
Languages:
JavaScript
https://github.com/mwilliamson/mammoth.js/commit/2888fa158d67c1419199f152326e12…
https://github.com/mwilliamson/mammoth.js/commit/31f0c370be4b95ac4fa285fea3be97…
https://raw.githubusercontent.com/mwilliamson/mammoth.js/master/NEWS
https://www.npmjs.com/package/mammoth