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CVE-2026-3449

@tootallnate/once: @tootallnate/once: Denial of Service due to incorrect control flow scoping with AbortSignal

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.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
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