CVE-2026-3449

Versions of the package @tootallnate/once before 3.0.1 are vulnerable to Incorrect Control Flow Scoping in promise resolving when…

Medium4.8EPSS 0.13%

Published: 3 Mar 2026
Updated: 4 May 2026
Reserved: 2 Mar 2026
Assigned by: snyk

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.

Scores

CVSS scores of CVE-2026-3449, by who scored it
Scored by	CVSS	Score	Vector
snykCNA (assigner)	4.0	Medium4.8	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
snykCNA (assigner)	3.1	Low3.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P
NVDNVD · Deferred	4.0	Low1.9	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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.13% · top 98% of all CVEs (6 Nov 2026)
CISA SSVC: Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.8.

Weakness

CWE-705: Incorrect Control Flow Scoping (opens in a new tab)All about CWE-705 and its CVEs

Affected products

@tootallnate/once
- affected < 3.0.1

Affected packages

From reviewed advisories of the GitHub Advisory Database.

npm@tootallnate/onceGHSA-vpq2-c234-7xj6 (opens in a new tab)

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-3449](https://trackcve.app/badge/CVE-2026-3449.svg)](https://trackcve.app/cve/CVE-2026-3449)

Record last updated 4 May 2026, 05:23 UTC.