CVE-2026-101059: Server-Side Request Forgery (SSRF) in universal-tool-calling-protocol python-utcp
utcp-http before 1.1.4 fails to validate the OAuth2 tokenUrl field from remote OpenAPI specifications, allowing attackers to redirect credential submission to arbitrary endpoints. When a victim registers an attacker-controlled OpenAPI spec and invokes a generated OAuth2-protected tool, the library POSTs the victim's client_id and client_secret to the attacker-supplied token endpoint without URL validation.
CVE-2026-101059: Server-Side Request Forgery (SSRF) in universal-tool-calling-protocol python-utcp
Description
utcp-http before 1.1.4 fails to validate the OAuth2 tokenUrl field from remote OpenAPI specifications, allowing attackers to redirect credential submission to arbitrary endpoints. When a victim registers an attacker-controlled OpenAPI spec and invokes a generated OAuth2-protected tool, the library POSTs the victim's client_id and client_secret to the attacker-supplied token endpoint without URL validation.
CVSS v4.0
Score 7.1high
Affected software
universal-tool-calling-protocol
python-utcp
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-27T16:38:56.428Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab9c996f7a7c54106f51d60
Added to database: 09/28/2026, 01:57:42 UTC
Last updated: 09/28/2026, 01:57:42 UTC
Views: 1
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