CVE-2026-85179: Server-Side Request Forgery (SSRF) in HumanSignal label-studio
Description
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.
CVSS v4.0
Score 8.4high
Affected software
HumanSignal
label-studio
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85179 is an SSRF vulnerability in HumanSignal's Label Studio product through version 1.23.0. The vulnerability arises because the application fails to validate webhook URLs, enabling authenticated users to dispatch HTTP requests to internal services, including private network addresses and cloud metadata endpoints. Attackers can exploit this to exfiltrate annotation data by configuring webhooks that transmit payloads to external endpoints.
Potential Impact
An attacker with authentication privileges can leverage this SSRF flaw to send requests to internal network resources that are normally inaccessible externally. This can result in unauthorized access to internal services and exfiltration of sensitive annotation data. The vulnerability has a high severity with a CVSS 4.0 score of 8.4, indicating significant risk if exploited.
Mitigation Recommendations
No official patch or remediation information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict webhook URL configurations to trusted domains and monitor for suspicious webhook activity. Consider limiting user permissions to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-03T11:08:17.526Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9982b8acd9273b4909fd6f
Added to database: 09/03/2026, 14:22:48 UTC
Last enriched: 09/25/2026, 02:46:22 UTC
Last updated: 10/18/2026, 18:48:24 UTC
Views: 89
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