Vulnerability record
CVE-2026-126570
The short answer
CVE-2026-126570 affects padloc padloc and is rated high (CVSS 7.0). It is not in CISA's Known Exploited Vulnerabilities catalog.
What it is
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.
Weakness: CWE-1321.
Severity
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/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
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
No score
FIRST scores CVEs within a day of publication
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- Present
- Privileges required
- High
- User interaction
- None
- Confidentiality impact
- None
- Integrity impact
- Low
- Availability impact
- High
Affected products
padloc. NVD's record lists the exact affected versions.
References
- github.com/padloc/padloc/blob/v4.3.0/packages/core/src/util.ts#L239-L251
- github.com/padloc/padloc/blob/v4.3.0/packages/server/src/scim.ts#L421-L428
- github.com/padloc/padloc/commit/7dd3d230ef299c71ac215c802600b5f2358f7ba3
- github.com/padloc/padloc/security/advisories/GHSA-crhv-mjrg-8vwm
- www.vulncheck.com/advisories/padloc-4.0.0-before-4.3.1-prototype-pollution-via-scim-patch-setpath
Questions
Is CVE-2026-126570 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-11.
How do I fix CVE-2026-126570?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Received. The description is NVD's text, quoted as published.
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