---
id: CVE-2026-61834
title: scim-patch is a library for applying SCIM patch operations
summary: >-
  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 …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-915
  - CWE-1321
vendor: thomaspoignant
product: scim-patch
affected:
  - scim-patch < 0.9.2
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:15.923'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61834'
references:
  - url: >-
      https://github.com/thomaspoignant/scim-patch/commit/c86474f7a9b16191d939f59ba94eca6c6e63044b
    label: security-advisories@github.com
  - url: 'https://github.com/thomaspoignant/scim-patch/pull/1127'
    label: security-advisories@github.com
  - url: 'https://github.com/thomaspoignant/scim-patch/releases/tag/v0.9.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj
    label: security-advisories@github.com
  - url: >-
      https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T16:20:07.829094Z'
ingestedAt: '2026-09-23T14:25:29.810Z'
epss: 0.0028
epssPercentile: 0.18185
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.