CVE-2026-114142
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
78/100
Published: 2026-10-21
Modified: 2026-10-28
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
AT:
None
VC:
None
VI:
High
VA:
High
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.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| BinaryMuse | toml-node | < 5.0.1 |
| BinaryMuse | toml-node | < 5.0.1 |