utcp-http before 1.1.4 OAuth2 tokenUrl Trust Boundary Bypass
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
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101059
python-utcp
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "universal-tool-calling-protocol",
"product": "python-utcp",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.1.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.1.4",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/utcp-http",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-101059
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #3132 · Revision 1
- Added to Heist Feed
- Publisher date