Sveltejs devalue from 1.0.0 before 5.9.3 contains a memory exhaustion flaw in uneval, whose generated code for sparse arrays allocates memory proportional to the array's declared length when evaluated. Attackers who can influence a very large sparse array serialized by an application can exhaust memory in the browser or runtime evaluating the output.
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Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sun, 08 Nov 2026 01:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Sveltejs devalue from 1.0.0 before 5.9.3 contains a memory exhaustion flaw in uneval, whose generated code for sparse arrays allocates memory proportional to the array's declared length when evaluated. Attackers who can influence a very large sparse array serialized by an application can exhaust memory in the browser or runtime evaluating the output. | |
| Title | Sveltejs devalue before 5.9.3 Memory Exhaustion via uneval Sparse Arrays | |
| First Time appeared |
Svelte
Svelte devalue |
|
| Weaknesses | CWE-770 | |
| CPEs | cpe:2.3:a:svelte:devalue:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Svelte
Svelte devalue |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-08T01:38:03.802Z
Reserved: 2026-11-06T00:50:45.483Z
Link: CVE-2026-123564
No data.
Status : Received
Published: 2026-11-08T02:16:48.877
Modified: 2026-11-08T02:16:48.877
Link: CVE-2026-123564
No data.
OpenCVE Enrichment
Updated: 2026-11-08T04:15:14Z
Weaknesses