CVE-2026-121561

Label Studio before 1.23.2 SSRF and Token Disclosure via Image Export Downloads

Assigner: VulnCheck
Reserved: 03.11.2026 Published: 03.11.2026 Updated: 03.11.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 7.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	HumanSignal
Product	label-studio
Versions	Default: unaffected affected from 0 to 1.23.2 (excl.)

Vendor

HumanSignal

Product

label-studio

Versions

Default: unaffected

affected from 0 to 1.23.2 (excl.)

Vendor	HumanSignal
Product	label-studio-sdk
Versions	Default: unaffected affected from 0 to 2.1.2 (excl.)

Vendor

HumanSignal

Product

label-studio-sdk

Versions

Default: unaffected

affected from 0 to 2.1.2 (excl.)

Credits

Michael Holmquist, HASP Labs finder

References

Problem Types