CVE-2026-85179

HIGH 8.5

Label Studio through 1.23.0 SSRF via Unvalidated Webhook URL

CVSS Score

8.5

EPSS Score

0.0%

EPSS Percentile

0th

Label Studio through 1.23.0 fails to validate webhook URLs, allowing authenticated users to dispatch requests to internal services including RFC 1918 addresses and cloud metadata endpoints. Attackers can create webhooks targeting private networks and exfiltrate annotation data by enabling payload transmission in outbound requests.

CWE	CWE-918
Vendor	humansignal
Product	label-studio
Published	Sep 3, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

HumanSignal / label-studio

0 ≤ 1.23.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/HumanSignal/label-studio/issues/9801 github.com: https://github.com/HumanSignal/label-studio github.com: https://github.com/HumanSignal/label-studio/blob/1.23.0/label_studio/webhooks/utils.py github.com: https://github.com/HumanSignal/label-studio/commit/2c1c1d6472153032af8ed399168f814bea854e3e vulncheck.com: https://www.vulncheck.com/advisories/label-studio-through-1.23.0-ssrf-via-unvalidated-webhook-url

Credits

🔍 George Chen