HIGHCVSS v3.1 7.1Vulnerability
CVE-2026-67542
Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.70, POST /api/mcp/fetch-tools is reachable by any authenticated user (lowest role; no admin/workflow association) and fetches an attacker-supplied URL through the sse and streamable_http transports with no scheme / private-IP / allowlist / redirect guard. The transport error is reflected in the HTTP 422 response, giving a semi-blind SSRF oracle, and the attacker also controls the outbound request headers. This issue has been patched in version 0.0.70.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-11-11T23:49:45.533241+00:00
- Cvss severity
- HIGH
- Cvss score
- 7.1
- Retrieved at
- 2026-11-11T23:50:19+00:00
- Score
- 7.1
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-67542
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- First seen by Signal
- 2026-11-11T23:46:42+00:00
- Name
- CVE-2026-67542
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- Published at
- 2026-11-11T22:17:28.813
- Last modified
- 2026-11-11T22:17:28.960
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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