All vulnerabilities
CVE-2026-101060GHSA-9qhg-99ww-9mqc

python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects

universal-tool-calling-protocol python-utcpPyPIRuntimes & languages
Open in ThreatlineRecord JSON
CVSS
8.4High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 28 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 7% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.1.4Fixed versionCVE List
Published27 Sep 2026Updated 28 Sep 2026CVE List

What fixes it

  • 1.1.4python-utcpCVE List
  • 1.1.4utcp-http, PyPIOSVpip install "utcp-http>=1.1.4"

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProtocol.call_tool that validates the initial tool URL but follows HTTP redirects without re-validating the target. Attackers controlling a tool endpoint can return a 302 redirect to internal services, allowing the UTCP client to reach cloud metadata endpoints or internal HTTP services and return their response bodies to the caller.

Text from CVE List

Affected versions 13

  • python-utcpaffected: all versions before 1.1.4CVE List
  • python-utcpunaffected: 1.1.4CVE List
  • utcp-http, PyPIfrom first release, fixed in 1.1.4OSV
  • utcp-http, PyPI1.0.0OSV
  • utcp-http, PyPI1.0.1OSV
  • utcp-http, PyPI1.0.2OSV
  • utcp-http, PyPI1.0.3OSV
  • utcp-http, PyPI1.0.4OSV
  • utcp-http, PyPI1.0.5OSV
  • utcp-http, PyPI1.1.0OSV
  • utcp-http, PyPI1.1.1OSV
  • utcp-http, PyPI1.1.2OSV
  • utcp-http, PyPI1.1.3OSV

References 2