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TI-2026-65092 Aliases CVE-2026-101059GHSA-r549-qqpm-phj8

utcp-http before 1.1.4 OAuth2 tokenUrl Trust Boundary Bypass

Priority MEDIUM 64CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Fix Fixed python-utcp (universal-tool-calling-protocol): 1.1.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
universal-tool-calling-protocolpython-utcpbefore 1.1.41.1.4Patch availableCNA

Remediation

  • Fix · CNA python-utcp (universal-tool-calling-protocol) Fixed in 1.1.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    universal-tool-calling-protocol python-utcp 1.1.4

    2 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-65093 python-utcp before 1.1.4 SSRF via unvalidated HTTP redirectsPriority HIGH 70
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-101059
  2. 2026-10-03 Alias added: GHSA-r549-qqpm-phj8

References

Advisory 1

  • TI-2026-33160 python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol CVSS 3.1HIGH 8.3
  • TI-2026-65093 python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects CVSS 4.0HIGH 8.4
  • TI-2026-10502 universal-tool-calling-protocol python-utcp utcp-gql/utcp-websocket server-side request forgery CVSS 4.0MEDIUM 5.3
  • TI-2026-65094 utcp-gql and utcp-websocket before 1.1.1 SSRF via URL validation bypass CVSS 4.0LOW 2.3
  • TI-2026-33161 python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection CVSS 3.1HIGH 7.7
  • TI-2026-65091 python-utcp before 1.1.12 SSRF via Remote HTTP Manual CVSS 4.0HIGH 7.1
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences