CVE-2026-121561 json
Label Studio before 1.23.2 SSRF and Token Disclosure via Image Export Downloads
published 6d ago modified 2d ago also EUVD-2026-115906
- cvss
- 7.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- HumanSignal label-studio 1.23.2
- HumanSignal label-studio-sdk 2.1.2
Is CVE-2026-121561 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2d ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/HumanSignal/label-studio/security/advisories/GHSA-6437-7wc6-gmx5 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | 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 |
| CNA | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| CNA | 4.0 | 6.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- HumanSignal label-studio
- HumanSignal label-studio-sdk
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/HumanSignal/label-studio/commit/df96d79183156e556d91825d15fa7721f1145e1a
patch
-
github.com
/HumanSignal/label-studio-sdk/commit/c20c899aaaa302740dacd46a47e5774bb677561f
patch
-
github.com
/HumanSignal/label-studio/security/advisories/GHSA-6437-7wc6-gmx5
vendor-advisory, exploit
-
github.com
/HumanSignal/label-studio/blob/1.23.1/label_studio/data_export/models.py#L160-L167
technical-description
-
github.com
/HumanSignal/label-studio-sdk/blob/2.1.1/src/label_studio_sdk/_extensions/label_studio_tools/core/utils/io.py#
technical-description
-
github.com
/HumanSignal/label-studio-sdk/blob/2.1.1/src/label_studio_sdk/_extensions/label_studio_tools/core/utils/io.py#
technical-description
-
vulncheck.com
/advisories/label-studio-before-1.23.2-ssrf-and-token-disclosure-via-image-export-downloads
third-party-advisory
Sources
- CVE List CVE-2026-121561
- NVD CVE-2026-121561
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.