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advisories/github-reviewed/2026/03/GHSA-vpq2-c234-7xj6/GHSA-vpq2-c234-7xj6.json

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"CVE-2026-3449"
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],
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"summary": "@tootallnate/once vulnerable to Incorrect Control Flow Scoping",
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"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.",
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"severity": [
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{
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"type": "CVSS_V3",
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"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
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},
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{
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"type": "CVSS_V4",
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"score": "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"
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}
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],
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"details": "Versions of the package @tootallnate/once before 2.0.1 and 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.",
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"severity": [],
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"affected": [
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{
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"package": {
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"events": [
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{
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"introduced": "0"
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},
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{
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"fixed": "3.0.1"
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}
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]
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}
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"type": "ADVISORY",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3449"
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},
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{
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"type": "WEB",
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"url": "https://github.com/TooTallNate/once/issues/11#issuecomment-4366821438"
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},
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{
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"type": "WEB",
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"url": "https://github.com/TooTallNate/once/issues/8"

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