# Universal Tool Calling Protocol vulnerabilities

Source: https://junglewise.ai/threats/vendors/universal-tool-calling-protocol  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/universal-tool-calling-protocol.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 8 vulnerabilities in Universal Tool Calling Protocol: 0 in the last 7 days and 4 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-101061, was published on 27 September 2026. Nothing in the last four weeks, down from 4 vulnerabilities in the four before. 3 technologies have a page of their own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 4
- All time: 8 (1 critical, 0 exploited in the wild)

## About Universal Tool Calling Protocol

Universal Tool Calling Protocol is an open standard for communication between AI agents and external tools.

## Latest Universal Tool Calling Protocol vulnerabilities

- [CVE-2026-101061: utcp-gql and utcp-websocket server-side request forgery via URL validation bypass](https://junglewise.ai/threats/cve-2026-101061-utcp-gql-before-1-1-1-and-utcp-websocket-before-1-1-1-contain) (medium, CVSS 4.7, published 27 Sep 2026)
- [CVE-2026-101060: python-utcp server-side request forgery via unvalidated HTTP redirects](https://junglewise.ai/threats/cve-2026-101060-python-utcp-versions-before-1-1-4-contain-a-server-side-request) (high, CVSS 8.2, published 27 Sep 2026)
- [CVE-2026-101059: utcp-http OAuth2 tokenUrl validation bypass in OpenAPI conversion](https://junglewise.ai/threats/cve-2026-101059-utcp-http-before-1-1-4-fails-to-validate-the-oauth2-tokenurl) (high, CVSS 7.1, published 27 Sep 2026)
- [CVE-2026-101058: python-utcp server-side request forgery via remote HTTP manual](https://junglewise.ai/threats/cve-2026-101058-python-utcp-pip-package-utcp-http-before-1-1-12-does-not-verify) (medium, CVSS 6.9, published 27 Sep 2026)
- [python-utcp localhost prefix validation bypass in utcp-gql and utcp-websocket](https://junglewise.ai/threats/python-utcp-localhost-prefix-validation-bypass-in-utcp-gql-and-utcp-cca0bdf1) (medium, CVSS 6.3, published 15 Jun 2026)
- [CVE-2026-12210: Universal Tool Calling Protocol SSRF via localhost validation bypass](https://junglewise.ai/threats/cve-2026-12210-universal-tool-calling-protocol-ssrf-via-localhost-validation) (medium, CVSS 6.3, published 15 Jun 2026)
- [CVE-2026-45366: typescript-utcp SSRF in @utcp/http via OpenAPI spec redirection](https://junglewise.ai/threats/cve-2026-45366-typescript-utcp-ssrf-in-utcp-http-via-openapi-spec-redirection) (medium, CVSS 4.7, published 28 May 2026)
- [CVE-2026-45369: python-utcp OS command injection in CLI communication protocol](https://junglewise.ai/threats/cve-2026-45369-python-utcp-os-command-injection-in-cli-communication-protocol) (critical, CVSS 10, published 14 May 2026)

## Most severe Universal Tool Calling Protocol vulnerabilities

- [CVE-2026-45369: python-utcp OS command injection in CLI communication protocol](https://junglewise.ai/threats/cve-2026-45369-python-utcp-os-command-injection-in-cli-communication-protocol) (critical, CVSS 10, published 14 May 2026)
- [CVE-2026-101060: python-utcp server-side request forgery via unvalidated HTTP redirects](https://junglewise.ai/threats/cve-2026-101060-python-utcp-versions-before-1-1-4-contain-a-server-side-request) (high, CVSS 8.2, published 27 Sep 2026)
- [CVE-2026-101059: utcp-http OAuth2 tokenUrl validation bypass in OpenAPI conversion](https://junglewise.ai/threats/cve-2026-101059-utcp-http-before-1-1-4-fails-to-validate-the-oauth2-tokenurl) (high, CVSS 7.1, published 27 Sep 2026)
- [CVE-2026-101058: python-utcp server-side request forgery via remote HTTP manual](https://junglewise.ai/threats/cve-2026-101058-python-utcp-pip-package-utcp-http-before-1-1-12-does-not-verify) (medium, CVSS 6.9, published 27 Sep 2026)
- [CVE-2026-12210: Universal Tool Calling Protocol SSRF via localhost validation bypass](https://junglewise.ai/threats/cve-2026-12210-universal-tool-calling-protocol-ssrf-via-localhost-validation) (medium, CVSS 6.3, published 15 Jun 2026)
- [python-utcp localhost prefix validation bypass in utcp-gql and utcp-websocket](https://junglewise.ai/threats/python-utcp-localhost-prefix-validation-bypass-in-utcp-gql-and-utcp-cca0bdf1) (medium, CVSS 6.3, published 15 Jun 2026)
- [CVE-2026-45366: typescript-utcp SSRF in @utcp/http via OpenAPI spec redirection](https://junglewise.ai/threats/cve-2026-45366-typescript-utcp-ssrf-in-utcp-http-via-openapi-spec-redirection) (medium, CVSS 4.7, published 28 May 2026)
- [CVE-2026-101061: utcp-gql and utcp-websocket server-side request forgery via URL validation bypass](https://junglewise.ai/threats/cve-2026-101061-utcp-gql-before-1-1-1-and-utcp-websocket-before-1-1-1-contain) (medium, CVSS 4.7, published 27 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 4 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Universal Tool Calling Protocol technologies

- [Universal Tool Calling Protocol Python-Utcp](https://junglewise.ai/threats/technologies/python-utcp): 5 vulnerabilities
- [Universal Tool Calling Protocol Utcp-Gql](https://junglewise.ai/threats/technologies/utcp-gql): 3 vulnerabilities
- [Universal Tool Calling Protocol Utcp-Websocket](https://junglewise.ai/threats/technologies/utcp-websocket): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Universal Tool Calling Protocol vulnerabilities", https://junglewise.ai/threats/vendors/universal-tool-calling-protocol, 9 November 2026.