---
id: CVE-2026-85179
title: >-
  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
summary: >-
  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…
severity: high
cvss: 8.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-918
vendor: HumanSignal
product: label-studio
affected:
  - label-studio <= 1.23.0
published: '2026-09-03'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85179'
references:
  - url: 'https://github.com/HumanSignal/label-studio'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/HumanSignal/label-studio/blob/1.23.0/label_studio/webhooks/utils.py
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/HumanSignal/label-studio/commit/2c1c1d6472153032af8ed399168f814bea854e3e
    label: disclosure@vulncheck.com
  - url: 'https://github.com/HumanSignal/label-studio/issues/9801'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/label-studio-through-1.23.0-ssrf-via-unvalidated-webhook-url
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00401
epssPercentile: 0.31648
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-05T01:22:12.763284Z'
ingestedAt: '2026-09-05T20:44:36.406Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.