CVE-2026-61834

scim-patch: Mutation of Inherited Built-in Method Objects

State: Published
Severity: 4.3 Medium
Published: Sep 23, 2026
Updated: Sep 23, 2026
Reserved: Jul 10, 2026

Description

scim-patch is a library for applying SCIM patch operations. Prior to 0.9.2, navigate() reads inherited properties and assign() uses prototype-chain membership checks while resolving attacker-controlled SCIM PATCH paths. A path or one of the dotted value keys beginning with an inherited property such as toString can therefore traverse into a shared built-in function object and add attacker-controlled properties, causing process-global mutation that may affect application logic reading inherited-method properties. This issue is fixed in version 0.9.2.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected Products

Product	Versions
scim-patchthomaspoignant	< 0.9.2Affected

References

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