CVE-2026-86115 Details
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.
A vulnerability in Sim versions prior to 0.8.14 allows authenticated workflow authors to bypass external URL validation and access internal-only API endpoints. This is achieved by exploiting the application's URL routing mechanism, which incorrectly classifies tool requests as internal based solely on URL prefix matching. The flaw arises because the routing process fails to normalize URL schemes before applying validation, enabling users to send requests to restricted endpoints while circumventing server-side checks.
Users can update to Sim version 0.8.14 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 5, 2026CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-441 | Unintended Proxy or Intermediary ('Confused Deputy') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Sim | >= 0, < 0.8.14 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 5, 2026 | New CVE Received | [email protected] |