CVE-2026-42570 | BDVDB-2026-338992 Detail
sveltejsdevalue
Description#
Svelte 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.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.
Weaknesses#
- CWE-770 Allocation of Resources Without Limits or Throttling
References#
- https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p
- https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d
- https://github.com/sveltejs/devalue/releases/tag/v5.8.1
- https://access.redhat.com/security/cve/CVE-2026-42570
- https://bugzilla.redhat.com/show_bug.cgi?id=2487050
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42570.json
- https://access.redhat.com/errata/RHSA-2026:57590
- https://access.redhat.com/errata/RHSA-2026:37272
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.