high · CVSS v3 7.5 · CVSS v4 8.7

CVE-2026-123564

Sveltejs devalue from 1.0.0 before 5.9.3 contains a memory exhaustion flaw in uneval, whose generated code for sparse ar…

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.

Scores

Severity
high
CVSS v2
7.8
CVSS v3
7.5
CVSS v4
8.7
EPSS
—

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