CVE-2026-3449

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Published 2026-03-03. Last modified 2026-06-17.