Label Studio fails to apply organization filters when resolving storage URIs for tasks and projects in proxy_api.py endpoints. Attackers can access other tenants' cloud storage objects by creating a separate organization and supplying arbitrary file URIs to presign or stream bucket contents.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
HumanSignal label-studio unaffected
Version Status Constraints
0 affected ≤ 1.23.0

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
Humansignal Subscribe
Label Studio Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/HumanSignal/label-studio cve-icon cve-icon
https://github.com/HumanSignal/label-studio/blob/1.23.0/label_studio/io_storages/proxy_api.py cve-icon cve-icon
https://github.com/HumanSignal/label-studio/issues/9924 cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/label-studio-through-1.23.0-cross-organization-storage-uri-resolution cve-icon cve-icon
History

Thu, 03 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 03 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Description Label Studio fails to apply organization filters when resolving storage URIs for tasks and projects in proxy_api.py endpoints. Attackers can access other tenants' cloud storage objects by creating a separate organization and supplying arbitrary file URIs to presign or stream bucket contents.
Title Label Studio through 1.23.0 Cross-Organization Storage URI Resolution
First Time appeared Humansignal
Humansignal label Studio
Weaknesses CWE-639
CPEs cpe:2.3:a:humansignal:label_studio:*:*:*:*:*:*:*:*
Vendors & Products Humansignal
Humansignal label Studio
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-03T14:37:19.197Z

Reserved: 2026-09-03T13:44:49.184Z

Link: CVE-2026-85211

cve-icon Vulnrichment

Updated: 2026-09-03T14:32:14.037Z

cve-icon NVD

Status : Received

Published: 2026-09-03T15:17:40.257

Modified: 2026-09-03T15:17:40.257

Link: CVE-2026-85211

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T16:00:08Z

Weaknesses