CVE-2026-50013: Concurrent Execution using Shared Resource with Improper Synchronization

Hoverfly is an open source API simulation tool. Prior to version 1.12.8, when Hoverfly is running in Diff mode, the AddDiff function writes to the shared responsesDiff map without any synchronization no mutex. When multiple proxy requests are processed concurrently the normal case for any proxy,...

Concurrent Execution Using Shared Resource

github.com/spectolabs/hoverfly is vulnerable to Concurrent Execution using Shared Resource. The vulnerability is due to the AddDiff function writing to the shared responsesDiff map without proper synchronization when running in Diff mode, which allows an attacker to send multiple simultaneous...

Hoverfly: Process Crash via Concurrent Map Write Race Condition in Diff Mode

Summary: When Hoverfly is running in Diff mode, the AddDiff function writes to the shared responsesDiff map without any synchronization no mutex. When multiple proxy requests are processed concurrently the normal case for any proxy, the concurrent map writes trigger Go's built-in race detector...

Missing Synchronization

Overview Affected versions of this package are vulnerable to Missing Synchronization in the AddDiff function when running in Diff mode, which writes to the shared responsesDiff map without synchronization. An attacker can cause the process to crash and become unavailable by sending multiple...