Description
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 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. This vulnerability is fixed in 5.6.2.
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 | >= 5.1.0, < 5.6.2 |
| Red Hat | Red Hat Trusted Artifact Signer 1.2 | — |
| Red Hat | Red Hat Trusted Artifact Signer 1.3 | — |
| Red Hat | Red Hat Build of Podman Desktop - Tech Preview | — |
References
- https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4Patch
- https://github.com/sveltejs/devalue/releases/tag/v5.6.2Release Notes
- https://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpfVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:2144
- https://access.redhat.com/errata/RHSA-2026:2926
- https://access.redhat.com/security/cve/CVE-2026-22775
- https://bugzilla.redhat.com/show_bug.cgi?id=2430109
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22775.json
Timeline
- Published
- Jan 15, 2026
- Last modified
- Jul 15, 2026
- NVD status
- Modified