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CVE-2026-50018

Hoverfly: Denial of Service via Goroutine Leak in Remote Post-Serve Actions PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
SpectoLabs / hoverflyaffected < 1.12.8

CWE

CWE-400, CWE-770

References

ADP enrichment

CISA-ADP

No English description supplied.