CVE-2026-3449

LOW3.3EPSS 0.02%

@tootallnate/once vulnerable to Incorrect Control Flow Scoping

Published: 3/3/2026Modified: 5/21/2026

Also known as:GHSA-vpq2-c234-7xj6CGA-5jrv-6f42-c3ph

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.

Affected packages (1)

npm/@tootallnate/once>= 3.0.0, < 3.0.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 4.0	—	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
osv	CVSS 3.1	LOW3.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References (6)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-3449
PATCHhttps://github.com/TooTallNate/once
WEBhttps://github.com/TooTallNate/once/commit/b9f43cc5259bee2952d91ad3cdbd201a82df448a
WEBhttps://github.com/TooTallNate/once/issues/8
WEBhttps://github.com/TooTallNate/once/releases/tag/v2.0.1
WEBhttps://security.snyk.io/vuln/SNYK-JS-TOOTALLNATEONCE-15250612