VDB-348524 · CVE-2026-3449 · Nessus 300775

tootallnate once up to 3.0.0 await/then incorrect control flow scoping

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3.2	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in tootallnate once up to 3.0.0. Affected by this vulnerability is the function await/then. Such manipulation leads to incorrect control flow scoping. This vulnerability is traded as CVE-2026-3449. An attack has to be approached locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in tootallnate once up to 3.0.0. It has been rated as problematic. Affected by this issue is the function await/then. The manipulation with an unknown input leads to a incorrect control flow scoping vulnerability. Using CWE to declare the problem leads to CWE-705. The product does not properly return control flow to the proper location after it has completed a task or detected an unusual condition. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at security.snyk.io. This vulnerability is handled as CVE-2026-3449 since 03/02/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 300775 (Linux Distros Unpatched Vulnerability : CVE-2026-3449), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.0.1 eliminates this vulnerability. Applying the patch b9f43cc5259bee2952d91ad3cdbd201a82df448a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (300775). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

tootallnate

Name

once

Version

License

open-source

Website

Product: https://github.com/TooTallNate/once/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.3
CNA Vector (snyk): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Incorrect control flow scoping
CWE: CWE-705
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 300775
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-3449

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: once 3.0.1
Patch: b9f43cc5259bee2952d91ad3cdbd201a82df448a

Timelineinfo

03/02/2026 CVE reserved
03/03/2026 +1 days Advisory disclosed
03/03/2026 +0 days VulDB entry created
05/19/2026 +77 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: SNYK-JS-TOOTALLNATEONCE-15250612
Status: Confirmed

CVE: CVE-2026-3449 (🔒)
GCVE (CVE): GCVE-0-2026-3449
GCVE (VulDB): GCVE-100-348524

Entryinfo

Created: 03/03/2026 07:04
Updated: 05/19/2026 19:31
Changes: 03/03/2026 07:04 (78), 03/05/2026 10:55 (2), 05/19/2026 19:31 (2)
Complete: 🔍
Cache ID: 216::103