Vulnerability 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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/geo-chen/oss/blob/main/sim.md
- https://github.com/simstudioai/sim
- https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/lib/auth/hybrid.ts
- https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/tools/index.ts
- https://github.com/simstudioai/sim/pull/7179
- https://www.vulncheck.com/advisories/sim-before-0.8.14-confused-deputy-in-tool-u
FAQ
What is CVE-2026-86115?
CVE-2026-86115 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 wor...
How severe is CVE-2026-86115?
CVE-2026-86115 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-86115?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.