{"id":"CVE-2026-3449","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-3449","generatedAt":"2026-10-28T00:51:21.456Z","title":"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.","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.","published":"2026-03-03T05:17:25.000Z","lastModified":"2026-06-17T10:43:36.000Z","status":"Deferred","sourceIdentifier":"report@snyk.io","cvss":{"version":"4.0","score":1.9,"severity":"LOW","vector":"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/M"},"cwe":["CWE-705"],"affected":[],"epss":{"score":0.00116,"percentile":0.01618,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/TooTallNate/once/commit/b9f43cc5259bee2952d91ad3cdbd201a82df448a","source":"report@snyk.io"},{"url":"https://github.com/TooTallNate/once/issues/8","source":"report@snyk.io"},{"url":"https://security.snyk.io/vuln/SNYK-JS-TOOTALLNATEONCE-15250612","source":"report@snyk.io"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-3449","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}