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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| sveltejs | devalue | >= 5.6.3, < 5.8.1 |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Trusted Artifact Signer 1.4 | — |
| Red Hat | Red Hat Build of Podman Desktop | — |
References
- https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792dPatch
- https://github.com/sveltejs/devalue/releases/tag/v5.8.1Product, Release Notes
- https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3pVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:37272
- https://access.redhat.com/errata/RHSA-2026:57590
- 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
Timeline
- Published
- Jun 9, 2026
- Last modified
- Aug 24, 2026
- NVD status
- Modified