CVE-2026-126570
Padloc 4.0.0 before 4.3.1 Prototype Pollution via SCIM PATCH setPath()
Padloc 4.0.0 before 4.3.1 contains a prototype pollution vulnerability that allows SCIM token holders to modify Object.prototype by sending crafted SCIM PATCH paths to ScimServer._handleScimUsersPatch(). Attackers can supply paths like __proto__.x or constructor.prototype.x passed to setPath() to pollute the shared server process, disrupting requests for all other organizations.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| padloc padloc padloc/padloc
github |
≥ 4.0.0; < 4.3.1 (affected, semver) 4.3.1 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.0 high |
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:H | CNA: VulnCheck |
| 3.1 / 7.6 high |
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/padloc/padloc/security/advisories/GHSA-crhv-mjrg-8vwmCNA: VulnCheck · vendor-advisory
- https://github.com/padloc/padloc/commit/7dd3d230ef299c71ac215c802600b5f2358f7ba3CNA: VulnCheck · patch
- https://github.com/padloc/padloc/blob/v4.3.0/packages/server/src/scim.ts#L421-L428CNA: VulnCheck · technical-description
- https://github.com/padloc/padloc/blob/v4.3.0/packages/core/src/util.ts#L239-L251CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/padloc-4.0.0-before-4.3.1-prototype-pollution-via-scim-patch-setpathCNA: VulnCheck · third-party-advisory
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