CVE-2026-22774Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job.
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Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.3.0 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 typed array hydration expecting an ArrayBuffer as input, but not checking the assumption before creating the typed array. This vulnerability is fixed in 5.6.2.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-405
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
svelte devalue svelte:devalue | from 5.3.0 before 5.6.2 | NVD |
References
- https://github.com/sveltejs/devalue/commit/e46afa64dd2b25aa35fb905ba5d20cea63aabbf7patch
- https://github.com/sveltejs/devalue/releases/tag/v5.6.2release-notes
- https://github.com/sveltejs/devalue/security/advisories/GHSA-vw5p-8cq8-m7mvvendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2144
- https://access.redhat.com/errata/RHSA-2026:2926
- https://access.redhat.com/security/cve/CVE-2026-22774
- https://bugzilla.redhat.com/show_bug.cgi?id=2430095
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22774.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.