Launch Week Day 1: Announcing Security Design Review
LOW 3.3 npm

@tootallnate/once vulnerable to Incorrect Control Flow Scoping

GHSA-vpq2-c234-7xj6 · CVE-2026-3449

Published · Modified

Description

Versions of the package @tootallnate/once before 3.0.1 are vulnerable to Incorrect Control Flow Scoping in promise resolving when AbortSignal option is used. The Promise remains in a permanently pending state after the signal is aborted, causing any await or .then() usage to hang indefinitely. This can cause a control-flow leak that can lead to stalled requests, blocked workers, or degraded application availability.

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