High severity7.5OSV Advisory· Published Jan 15, 2026· Updated Jul 15, 2026
CVE-2026-22774
CVE-2026-22774
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
devaluenpm | >= 5.3.0, < 5.6.2 | 5.6.2 |
Affected products
3Patches
Vulnerability mechanics
References
11- github.com/sveltejs/devalue/commit/e46afa64dd2b25aa35fb905ba5d20cea63aabbf7nvdPatchWEB
- github.com/advisories/GHSA-vw5p-8cq8-m7mvghsaADVISORY
- github.com/sveltejs/devalue/security/advisories/GHSA-vw5p-8cq8-m7mvnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-22774ghsaADVISORY
- github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4ghsaWEB
- github.com/sveltejs/devalue/releases/tag/v5.6.2nvdRelease NotesWEB
- access.redhat.com/errata/RHSA-2026:2144nvd
- access.redhat.com/errata/RHSA-2026:2926nvd
- access.redhat.com/security/cve/CVE-2026-22774nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22774.jsonnvd
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