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Advisories

Sveltejs devalue before 5.9.3 Memory Exhaustion via uneval Sparse Arrays

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Severity
high
Date
Affecting

  • devalue >= 1.0.0, < 5.9.3

CWE
  • CWE-770 Allocation of Resources Without Limits or Throttling
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
elliott-with-the-longest-name-on-github
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.

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