Sveltejs devalue before 5.9.3 contains a denial of service vulnerability that allows attackers to cause CPU amplification by supplying sparse arrays to uneval. Attackers who influence sparse values passed to uneval can force synchronous work proportional to the declared array length, blocking the event loop.
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Affected Vendors & Products
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History
Mon, 09 Nov 2026 20:30:00 +0000
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ssvc
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Sun, 08 Nov 2026 01:45:00 +0000
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| Description | Sveltejs devalue before 5.9.3 contains a denial of service vulnerability that allows attackers to cause CPU amplification by supplying sparse arrays to uneval. Attackers who influence sparse values passed to uneval can force synchronous work proportional to the declared array length, blocking the event loop. | |
| Title | Devalue before 5.9.3 CPU Amplification Denial of Service via uneval | |
| First Time appeared |
Svelte
Svelte devalue |
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| Weaknesses | CWE-400 | |
| CPEs | cpe:2.3:a:svelte:devalue:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Svelte
Svelte devalue |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-11-08T01:38:05.159Z
Updated: 2026-11-09T13:56:46.305Z
Reserved: 2026-11-06T00:53:14.312Z
Link: CVE-2026-123566
Updated: 2026-11-09T13:56:39.158Z
Status : Received
Published: 2026-11-08T02:16:49.197
Modified: 2026-11-09T14:17:11.550
Link: CVE-2026-123566
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