CVE-2026-22774
Devalue is vulnerable to denial of service due to memory exhaustion in devalue.parse
Impact
## Summary 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. ## Details The parser's typed array hydration logic does not properly validate input before processing. Specially crafted inputs can cause disproportionate memory allocation or CPU usage on the receiving system. ## Impact This is a denial of service vulnerability affecting systems that use `devalue.parse` to handle data from potentially untrusted sources. Affected systems should upgrade to patched versions immediately.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | devalue | >= 5.3.0, <= 5.6.1 | 5.6.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Svelte | Devalue | from 5.3.0 before 5.6.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/sveltejs/devalue/commit/e46afa64dd2b25aa35fb905ba5d20cea63aabbf7
- https://github.com/sveltejs/devalue/releases/tag/v5.6.2
- https://github.com/sveltejs/devalue/security/advisories/GHSA-vw5p-8cq8-m7mv
- 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
- https://github.com/advisories/GHSA-vw5p-8cq8-m7mv
- https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4
- https://nvd.nist.gov/vuln/detail/CVE-2026-22774