CVE-2026-86115: Unintended Proxy or Intermediary ('Confused Deputy') in simstudioai sim
Sim before 0.8.14 classifies tool requests as internal based on URL prefix matching without scheme normalization, skipping SSRF validation and minting internal authentication tokens. Authenticated workflow authors can bypass external URL validation by supplying paths starting with /api/ in HTTP blocks to reach internal-only endpoints like POST /api/function/execute.
CVE-2026-86115: Unintended Proxy or Intermediary ('Confused Deputy') in simstudioai sim
Description
Sim before 0.8.14 classifies tool requests as internal based on URL prefix matching without scheme normalization, skipping SSRF validation and minting internal authentication tokens. Authenticated workflow authors can bypass external URL validation by supplying paths starting with /api/ in HTTP blocks to reach internal-only endpoints like POST /api/function/execute.
CVSS v4.0
Score 5.3medium
Affected software
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Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-05T01:59:20.600Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9bed73acd9273b49b1c66c
Added to database: 09/05/2026, 10:22:43 UTC
Last updated: 09/06/2026, 02:23:22 UTC
Views: 14
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