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.
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