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CVE-2026-76073— Label Studio through 1.23.0 Cross-Organization Annotation Access via Unscoped AnnotationAPI Queryset

Quick assessment

Affected
HumanSignal label-studio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HumanSignal label-studio是HumanSignal公司的一款数据标注工具。 HumanSignal label-studio 1.23.0及之前版本存在授权问题漏洞，该漏洞源于注释详情端点未按请求用户所属组织限定范围，可能导致任意登录用户枚举注释标识符读取、修改、删除其他组织的注释。

CVSS 8.8 · High EPSS 0.52% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
HumanSignal label-studio ≤ 1.23.0 affected
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I. Basic Information for CVE-2026-76073

Vulnerability Information
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Vulnerability Title
Label Studio through 1.23.0 Cross-Organization Annotation Access via Unscoped AnnotationAPI Queryset
Source: CVE Program / CVE List V5
Vulnerability Description
Label Studio does not scope the annotation detail endpoint to the requesting user's organization. AnnotationAPI in label_studio/tasks/api.py declares queryset = Annotation.objects.all() and provides no get_queryset override, so the default lookup retrieves any annotation by primary key. The view's permission_required entries name annotations.view, annotations.change and annotations.delete, and label_studio/core/permissions.py registers every permission with rules.is_authenticated, so the check is satisfied by any logged-in account and no object-level organization test runs. The sibling task endpoint does constrain its queryset with project__organization set to the requester's active organization, which is the boundary this path omits. Annotation identifiers are sequential integers, so an authenticated user of one organization can enumerate identifiers to read, modify and delete annotations belonging to other organizations on the same instance. The same unscoped queryset appears on AnnotationConvertAPI in the same file.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
HumanSignal label-studio 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HumanSignal label-studio是HumanSignal公司的一款数据标注工具。 HumanSignal label-studio 1.23.0及之前版本存在授权问题漏洞，该漏洞源于注释详情端点未按请求用户所属组织限定范围，可能导致任意登录用户枚举注释标识符读取、修改、删除其他组织的注释。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HumanSignal label-studio 0 ~ 1.23.0 -

II. Public POCs for CVE-2026-76073

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III. Intelligence Information for CVE-2026-76073

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Vendor Advisories for CVE-2026-76073 (1)

Proof of Concept for CVE-2026-76073 (1)

Vendor Pages for CVE-2026-76073 (1)

IV. Related Vulnerabilities

Same product: label-studio
Same vendor: HumanSignal
Same weakness: CWE-639

V. Comments for CVE-2026-76073

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