CVE-2026-48170
CVE-2026-48170 · scimPatch vulnerable to prototype pollution via unfiltered keys in patch
This page contains facts from public vulnerability sources. Check the original advisory before updating.
`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.prototype.someProp` is set process-wide, affecting every plain object in the Node process. Any service that calls `scimPatch()` on attacker-controlled JSON (i.e. any SCIM endpoint accepting `PATCH` from an external IdP) is exploitable on a stock Node runtime. Version 0.9.1 contains a patch. A workaround is available. Calling `Object.freeze(Object.prototype)` (and the same on `Array.prototype`, `Function.prototype`) at process startup neutralizes this class of bug — assignment to a frozen prototype becomes a silent no-op in sloppy mode or a `TypeError` in strict mode. Node's `--frozen-intrinsics` flag does this for built-ins automatically.
CVSS 9.1 · Critical · EPSS 0.4% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
scim-patch
- Versions
- < 0.9.1: Affected
No fix published
scim-patch npm
- Affected ranges
- SEMVER: < 0.9.1
Update to 0.9.1