Svelte Devalue vulnerabilities
4 vulnerabilities
Known vulnerabilities in Svelte Devalue, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
PrioritiseCVE-2026-42570sveltejs · devalue +2 moreSvelte devalue: DoS via sparse array deserializationSvelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1.CVSS7.5HighEPSS0.40%RoutineCVE-2026-30226sveltejs · devalue +2 moredevalue has prototype pollution in devalue.parse and devalue.unflattenSvelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. In devalue v5.6.3 and earlier, devalue.parse and devalue.unflatten were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion. This vulnerability is fixed in 5.6.4.CVSS7.5HighEPSS0.42%PrioritiseCVE-2026-22775sveltejs · devalue +2 moredevalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parseSvelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.1.0 to 5.6.1, certain inputs can cause devalue.parse to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using devalue.parse on externally-supplied data. The root cause is the ArrayBuffer hydration expecting base64 encoded strings as input, but not checking the assumption before decoding the input. This vulnerability is fixed in 5.6.2.CVSS7.5HighEPSS0.63%PrioritiseCVE-2026-22774sveltejs · devalue +2 moredevalue vulnerable to denial of service due to memory exhaustion in devalue.parseSvelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.3.0 to 5.6.1, certain inputs can cause devalue.parse to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using devalue.parse on externally-supplied data. The root cause is the typed array hydration expecting an ArrayBuffer as input, but not checking the assumption before creating the typed array. This vulnerability is fixed in 5.6.2.CVSS7.5HighEPSS0.63%