scim-patch: Mutation of Inherited Built-in Method Objects
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-915.
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 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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| thomaspoignant | scim-patch | before 0.9.2 | 0.9.2 | Patch available | CNA |
| — | scim-patch (npm) | before 0.9.2 | 0.9.2 | Patch available | GHSA-2mhw-wcx5-v3xj |
- scim-patch Vendorthomaspoignant Affected before 0.9.2 Fixed in 0.9.2 Patch available CNA
- scim-patch (npm) Vendor— Affected before 0.9.2 Fixed in 0.9.2 Patch available GHSA-2mhw-wcx5-v3xj
Remediation
- Fix · CNA scim-patch (thomaspoignant) Fixed in 0.9.2
- Fix · GHSA-2mhw-wcx5-v3xj scim-patch (npm) Fixed in 0.9.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-61834
- 2026-10-03 Alias added: GHSA-2mhw-wcx5-v3xj
References
Other 5
- https://github.com/thomaspoignant/scim-patch/security/advisories/GHSA-2mhw-wcx5-v3xj
- https://github.com/thomaspoignant/scim-patch/pull/1127
- https://github.com/thomaspoignant/scim-patch/commit/c86474f7a9b16191d939f59ba94eca6c6e63044b
- https://github.com/thomaspoignant/scim-patch/releases/tag/v0.9.2
- https://github.com/thomaspoignant/scim-patch
More thomaspoignant vulnerabilities
- TI-2026-35605 scimPatch vulnerable to prototype pollution via unfiltered keys in patch CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-61834 · CVE Program
- CVE-2026-61834 · NVD
- FIRST EPSS
- GHSA-2mhw-wcx5-v3xj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences