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CVE-2026-121561— Label Studio before 1.23.2 SSRF and Token Disclosure via Image Export Downloads

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 1.23.2 之前的版本（以及 label-studio-sdk 2.1.2 之前的版本）存在服务端请求伪造（SSRF）漏洞。该漏洞允许已认证用户通过包含图像的导出格式读取内部 URL。攻击者可以导入数据字段 指向内部服务的任务，并以 YOLO 或 COCO 格式（含图像）导出，从而读取响应内容；同时通过伪造 Host 头，窃取组织所有者的 API 令牌。

CVSS 7.7 · High
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I. Basic Information for CVE-2026-121561

Vulnerability Information
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Vulnerability Title
Label Studio before 1.23.2 SSRF and Token Disclosure via Image Export Downloads
Source: CVE Program / CVE List V5
Vulnerability Description
Label Studio before 1.23.2 (label-studio-sdk before 2.1.2) contains a server-side request forgery vulnerability that allows authenticated users to read internal URLs through image-bearing export formats. Attackers can import tasks with data.image pointing at internal services, export as YOLO or COCO with images to read responses, and spoof Host to capture the organization owner's API token.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
HumanSignal label-studio 0 ~ 1.23.2 -
HumanSignal label-studio-sdk 0 ~ 2.1.2 -

II. Public POCs for CVE-2026-121561

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III. Intelligence Information for CVE-2026-121561

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Other References for CVE-2026-121561 (7)

IV. Related Vulnerabilities

Same product: label-studio
Same vendor: HumanSignal
Same weakness: CWE-918