Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck
CVE-2026-85179Label Studio through 1.23.0 SSRF via Unvalidated Webhook URL
High 8.5
In plain English
A high-severity server-side request forgery in label-studio from HumanSignal. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.4%top 65.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HumanSignal | label-studio | 0 – through 1.23.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
References
- GitHub Issue #9801 issue-tracking
- https://github.com/HumanSignal/label-studio product
- webhooks/utils.py at 1.23.0 technical-description
- https://github.com/HumanSignal/label-studio/commit/2c1c1d6472153032af8ed399168f814bea854e3e patch
- VulnCheck Advisory: Label Studio through 1.23.0 SSRF via Unvalidated Webhook URL third-party-advisory