EUVD-2026-56030
GHSA-f786-ccx7-hwcw
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Network-accessible import endpoint (AV:N, AC:L); low-privilege account required (PR:L); only confidentiality impacted via internal data read (C:H, I:N, A:N); no scope change.
Primary rating from Vendor (TuranSec).
CVSS VectorVendor: TuranSec
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
1DescriptionCVE.org
A server-side request forgery vulnerability in HumanSignal Label Studio through 1.24.0.dev0 exists because SSRF_PROTECTION_ENABLED is set to false by default. The import-from-URL endpoint fetches any caller-supplied URL including internal loopback addresses on the default installation. An authenticated user can use this to reach internal services, cloud metadata endpoints, and other resources not intended for external access.
AnalysisAI
Server-side request forgery in HumanSignal Label Studio through 1.24.0.dev0 allows authenticated users to direct the server's import-from-URL endpoint to fetch arbitrary internal addresses, including cloud instance metadata services and RFC-1918 private network hosts. The vulnerability exists because the built-in SSRF mitigation flag SSRF_PROTECTION_ENABLED defaults to false, leaving all default installations exposed without any additional misconfiguration required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid Label Studio user account at any privilege level, including standard annotator accounts, as indicated by the PR:L CVSS metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 Medium score reflects the authentication requirement (PR:L) that bounds the attack surface to credentialed users, while correctly capturing the high confidentiality impact from potential cloud credential theft. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An annotator with a standard Label Studio account submits an import task pointing the import-from-URL endpoint to http://169.254.169.254/latest/meta-data/iam/security-credentials/ on an AWS-hosted Label Studio instance. The server fetches the URL server-side and returns the IAM role's temporary access key, secret, and session token in the response, which the attacker uses to authenticate directly to AWS services and escalate privileges. … |
| Remediation | The primary fix is to explicitly set `SSRF_PROTECTION_ENABLED=true` in the Label Studio server configuration, which activates the vendor-provided SSRF mitigations already present in the codebase - this should be applied immediately to all existing deployments regardless of version. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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