Padloc 4.0.0 before 4.3.1 Prototype Pollution via SCIM PATCH setPath()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-126570
StatePUBLISHED
AssignerVulnCheck
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 03:16:51 UTC
Updated2026-11-11 03:16:51 UTC
DescriptionPadloc 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.

Risk And Classification

Primary CVSS: v4.0 7 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-1321 | CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:H/E:X/C...
4.0CNACVSS7HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:H
3.1[email protected]Primary7.6HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H
3.1CNACVSS7.6HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Sub Conf.
None
Sub Integrity
Low
Sub Availability
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Padloc Padloc affected 4.0.0 4.3.1 semver Not specified
CNA Padloc Padloc unaffected 4.3.1 semver Not specified

References

ReferenceSourceLinkTags
github.com/padloc/padloc/blob/v4.3.0/packages/server/src/scim.ts [email protected] github.com
github.com/padloc/padloc/blob/v4.3.0/packages/core/src/util.ts [email protected] github.com
www.vulncheck.com/advisories/padloc-4.0.0-before-4.3.1-prototype-pollution-via-... [email protected] www.vulncheck.com
github.com/padloc/padloc/commit/7dd3d230ef299c71ac215c802600b5f2358f7ba3 [email protected] github.com
github.com/padloc/padloc/security/advisories/GHSA-crhv-mjrg-8vwm [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Zachariah Mithani (AploSec) (en)

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