5.3
Medium
CVE-2026-81176 Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for…
Description
Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. Prior to 5.9.2, devalue.parse does not reject out-of-bounds indices that are greater than or equal to values.length in src/parse.js. A specially crafted untrusted payload can make the parser alternate between array representations, producing quadratic work as the payload grows and causing denial of service in applications that parse untrusted devalue data. This issue is fixed in version 5.9.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| devalue 5.9 | earliest → < 5.9.2 | 5.9.2 |
Other CVEs of devalue
The 16 CVEs of devalue →
CVE-2026-123569
Devalue before 5.6.3 Denial of Service via Sparse Array Serialization
8.7
High
CVE-2026-123568
Sveltejs devalue before 5.6.3 Prototype Pollution via uneval Output
2.1
Low
CVE-2026-123566
Devalue before 5.9.3 CPU Amplification Denial of Service via uneval
8.7
High
CVE-2026-123567
Sveltejs devalue before 5.6.4 Prototype Injection via parse and unflatten
6.3
Medium