CVE Catalog

CVE-2026-86115

MediumCVSS 5.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.30%

23th percentile - higher than 23% of all known CVEs

Summary

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.

Risk Assessment

The risk includes unauthorized access to internal services and potential execution of dangerous operations, potentially leading to system compromise.

Recommendation

Update Sim to version 0.8.14 or later, which normalizes URL schemes and properly validates requests. Additionally, restrict workflow author permissions.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS