CVE-2026-3449
Low
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.
SeverityLow
CVSS3.3
Exploit probability—
Product@tootallnate/once
PublishedMar 3, 2026
First seenMar 3, 2026
Weakness typeCWE-705CWE-705
How to fix
Update
- @tootallnate/once3.0.1, 2.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @tootallnate/oncenpm | 3.0.0 ≤ v < 3.0.1, v < 2.0.1 | 3.0.1, 2.0.1 |
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