CVE-2026-114142: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in BinaryMuse toml-node
Description
toml-node is a TOML parser for Node.js and the browser. Prior to 5.0.1, toml.parse() can write attacker-controlled properties to Object.prototype because quoteDottedString() in lib/compiler.js produces the same bookkeeping string for distinct quoted key paths, allowing addTableArray() to clear another key's guard. The assign() path then descends through an unowned Date value without applying the owned-container check and can reach the prototype chain. Objects created elsewhere in the process can inherit the injected property. This issue is fixed in version 5.0.1.
CVSS v4.0
Score 8.8high
Affected software
BinaryMuse
toml-node
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-20T21:53:58.473Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad924934d27ba8daaff48a9
Added to database: 10/21/2026, 20:46:11 UTC
Last updated: 10/21/2026, 20:46:11 UTC
Views: 1
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