Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

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.

Label Studio 未将标注详情接口（annotation detail endpoint）的作用域限制在请求用户所属的组织内。 中的 定义了 ，并且没有提供 的重写方法，因此默认的查询逻辑会通过主键获取任意一条标注记录。该视图所要求的权限（ ）包括 、 和 ，而 中将所有权限配置为仅要求用户通过身份验证（ ），因此任何已登录的用户账户均可通过权限检查，且未执行基于对象级别的组织归属校验。 相比之下，同文件中的 sibling task 接口会将其查询集限制为请求用户当前活跃组织所属的项目（通过 字段），从而

CVSS 8.8 · High EPSS 0.28% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
HumanSignal label-studio ≤ 1.23.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-76073

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

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

Affected Products

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

II. Public POCs for CVE-2026-76073

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-76073

请登录查看更多情报信息。

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

No comments yet

Leave a comment