What is CVE-2026-48170?

CVE-2026-48170 is a critical-severity vulnerability in Thomaspoignant Scim-patch, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.1/10. Published 2026-08-07.

How severe is CVE-2026-48170?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Prototype Pollution in Thomaspoignant Scim-patch

CVE-2026-48170

`scim-patch`, a library to perform SCIM patch, prior to version 0.9.1 performs prototype pollution when applying a SCIM PATCH operation whose `value` object contains a key like `"__proto__.someProp"`. After one such patch, `Object.prototyp…

Vulnerability class: Prototype Pollution

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L.

Affected products

Thomaspoignant Scim-patch — versions < 0.9.1

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-48170?: CVE-2026-48170 is a critical-severity vulnerability in Thomaspoignant Scim-patch, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.1/10. Published 2026-08-07.
How severe is CVE-2026-48170?: Critical severity. CVSS v3 base score is 9.1 out of 10.