CVE-2026-3449 (Low) detected in once-1.1.2.tgz

[mend-bolt-for-github]

CVE-2026-3449 - Low Severity Vulnerability

Vulnerable Library - once-1.1.2.tgz

Creates a Promise that waits for a single event

Library home page: https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz

Path to dependency file: /ui/package.json

Path to vulnerable library: /ui/node_modules/.pnpm/@TooTallNate+once@1.1.2/node_modules/@tootallnate/once/package.json

Dependency Hierarchy:

• @postgres.ai/ce-4.0.3.tgz (Root Library)
  • react-scripts-5.0.1.tgz
    • jest-27.5.1.tgz
      • core-27.5.1.tgz
        • jest-config-27.5.1.tgz
          • jest-environment-jsdom-27.5.1.tgz
            • jsdom-16.7.0.tgz
              • http-proxy-agent-4.0.1.tgz
                • ❌ once-1.1.2.tgz (Vulnerable Library)

Found in base branch: master

Vulnerability Details

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.

Publish Date: 2026-03-03

URL: CVE-2026-3449

CVSS 3 Score Details (3.3)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-03-03

Fix Resolution: @tootallnate/once - 3.0.1

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