Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

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

High 7.7

In plain English

A high-severity server-side request forgery in label-studio from HumanSignal. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.4%top 62.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
HumanSignal	label-studio	0 – before 1.23.2
HumanSignal	label-studio-sdk	0 – before 2.1.2

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-6437-7wc6-gmx5) vendor-advisory
label-studio fix commit patch
label-studio-sdk fix commit patch
https://github.com/HumanSignal/label-studio/blob/1.23.1/label_studio/data_export/models.py#L160-L167 technical-description
https://github.com/HumanSignal/label-studio-sdk/blob/2.1.1/src/label_studio_sdk/_extensions/label_studio_tools/core/utils/io.py#L62-L71 technical-description
https://github.com/HumanSignal/label-studio-sdk/blob/2.1.1/src/label_studio_sdk/_extensions/label_studio_tools/core/utils/io.py#L299-L338 technical-description
VulnCheck Advisory: Label Studio before 1.23.2 SSRF and Token Disclosure via Image Export Downloads third-party-advisory