CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-22775
High (7.5) in svelte devalue. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in devalue 5.6.2.
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.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-31)
- CWE
- CWE-405
- Published
- Modified
- Record from
- the NVD, synced
Affected
- svelte:devalue
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g2pg-6438-jwpf | npm | devalue | >=5.1.0 <5.6.2 | 5.6.2 |
References
- https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4
- https://github.com/sveltejs/devalue/releases/tag/v5.6.2
- https://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpf
- https://access.redhat.com/errata/RHSA-2026:2144
- https://access.redhat.com/errata/RHSA-2026:2926