Vulnerability 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.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/TooTallNate/once/commit/b9f43cc5259bee2952d91ad3cdbd201a82df4
- https://github.com/TooTallNate/once/issues/8
- https://security.snyk.io/vuln/SNYK-JS-TOOTALLNATEONCE-15250612
FAQ
What is CVE-2026-3449?
CVE-2026-3449 is a vulnerability with a CVSS score of 3.3 (LOW). 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 pendi...
How severe is CVE-2026-3449?
CVE-2026-3449 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3449?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.