SSRF in Humansignal Label-Studio
CVE-2026-121561
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/HumanSignal/label-studio/security/advisories/GHSA-6437-7wc6-gmx5 (vendor-advisory)
- github.com/HumanSignal/label-studio/commit/df96d79183156e556d91825d15fa7721f114… (patch)
- github.com/HumanSignal/label-studio-sdk/commit/c20c899aaaa302740dacd46a47e5774b… (patch)
- github.com/HumanSignal/label-studio/blob/1.23.1/label_studio/data_export/models… (technical-description)
- github.com/HumanSignal/label-studio-sdk/blob/2.1.1/src/label_studio_sdk/_extens… (technical-description)
- github.com/HumanSignal/label-studio-sdk/blob/2.1.1/src/label_studio_sdk/_extens… (technical-description)
- www.vulncheck.com/advisories/label-studio-before-1.23.2-ssrf-and-token-disclosu… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121561?
- CVE-2026-121561 is a high-severity vulnerability in Humansignal Label-Studio, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-11-03.
- How severe is CVE-2026-121561?
- High severity. CVSS v3 base score is 7.7 out of 10.