GHSA-77VG-94RM-HX3P Svelte devalue: DoS via sparse array deserialization

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...

PT-2026-41133

Name of the Vulnerable Software and Affected Versions devalue affected versions not specified Description The devalue.parse function may allocate excessive memory when deserializing sparse arrays due to specific behaviors in some JavaScript engines. This can lead to high memory consumption...

GHSA-MWV9-GP5H-FRR4 Sveltejs devalue's `devalue.parse` and `devalue.unflatten` emit objects with `__proto__` own properties

In some circumstances, devalue.parse and devalue.unflatten could emit objects with proto own properties. This in and of itself is not a security vulnerability and is possible with, for example, JSON.parse as well, but it can result in prototype injection if downstream code handles it incorrectly:...

Sveltejs devalue's `devalue.parse` and `devalue.unflatten` emit objects with `__proto__` own properties

In some circumstances, devalue.parse and devalue.unflatten could emit objects with proto own properties. This in and of itself is not a security vulnerability and is possible with, for example, JSON.parse as well, but it can result in prototype injection if downstream code handles it incorrectly:...

CVE-2026-30226

Svelte 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...

SUSE CVE-2026-22775

Svelte 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 inpu...

devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse

Summary 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...

GHSA-G2PG-6438-JWPF devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse

Summary 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...

CVE-2026-22775

Svelte 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 inpu...

CVE-2026-22775 devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse

Svelte 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 inpu...

CVE-2026-22775 devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse

Svelte 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 inpu...

CVE-2026-22774

CVE-2026-22774 affects the Svelte devalue library. From versions 5.3.0 through 5.6.1, certain inputs trigger devalue.parse to consume excessive CPU time and memory when processing untrusted data, potentially causing denial of service. Root cause: typed array hydration assumes an ArrayBuffer input...

CVE-2026-22774 devalue vulnerable to denial of service due to memory exhaustion in devalue.parse

Svelte 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 inpu...

CVE-2026-22774 devalue vulnerable to denial of service due to memory exhaustion in devalue.parse

Svelte 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 inpu...

CVE-2026-22774

Svelte 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 inpu...

CVE-2025-57820

CVE-2025-57820 affects the JavaScript library devalue (used with Svelte). Prior to version 5.3.2, parsing payloads with devalue.parse could allow a proto property and non-numeric indices to be treated in dangerous ways, enabling prototype pollution on objects via the prototype chain. The issue is...

CVE-2025-57820 Svelte devalue vulnerable to prototype pollution

Svelte devalue is a utility library. Prior to version 5.3.2, a string passed to devalue.parse could represent an object with a proto property and devalue.parse does not check that an index is numeric. This could result in assigning prototypes to objects and properties, leading to prototype...

CVE-2025-57820 Svelte devalue vulnerable to prototype pollution

Svelte devalue is a utility library. Prior to version 5.3.2, a string passed to devalue.parse could represent an object with a proto property and devalue.parse does not check that an index is numeric. This could result in assigning prototypes to objects and properties, leading to prototype...

devalue prototype pollution vulnerability

devalue.parse allows proto to be set A string passed to devalue.parse could represent an object with a proto property, which would assign a prototype to an object while allowing properties to be overwritten: js class Vector constructorx, y this.x = x; this.y = y; get magnitude return this.x 2 +...

Prototype Pollution

Overview devalue is a JSON.stringify, but handles cyclical references, repeated references, undefined, regular expressions, dates, Map and Set. Affected versions of this package are vulnerable to Prototype Pollution via the parse function. An attacker can manipulate object prototypes or assign...