GHSA-g2pg-6438-jwpf devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse

• npm devalue: >= 5.1.0, < 5.6.2 → fixed in 5.6.2

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` hydration expecting base64 encoded strings as input, but not checking the assumption before decoding the input. Details The parser's `ArrayBuffer` hydration logic does not properly validate input before processing. Specially crafted inputs can cause disproportionate memory allocation or CPU usage on the receiving system. Impact This is a denial of service vulnerability affecting systems that use `devalue.parse` to handle data from potentially untrusted sources. Affected systems should upgrade to patched versions immediately.