CVE-2026-50018
Hoverfly: Denial of Service via Goroutine Leak in Remote Post-Serve Actions
Hoverfly is an open source API simulation tool. Prior to version 1.12.8, remote post-serve actions use `http.DefaultClient` without any timeout configuration. When the remote endpoint is unreachable or intentionally slow (accepts TCP connection but never responds), each triggered proxy request spawns a goroutine that blocks indefinitely on `http.DefaultClient.Do()`. An attacker can cause unbounded goroutine accumulation leading to memory exhaustion and process crash (OOM kill). Unlike local post-serve action execution, this requires no binary execution, only a URL pointing to a non-responsive endpoint. Version 1.12.8 patches the issue.
| CWE | CWE-400 CWE-770 |
| Vendor | spectolabs |
| Product | hoverfly |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
Get instant alerts for spectolabs hoverfly
Be the first to know when new medium vulnerabilities affecting spectolabs hoverfly are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H