CVE-2026-22775
HIGH7.5EPSS 0.04%devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse
Description
## 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 `ArrayBuffer` hydration expecting base64 encoded strings as input, but not checking the assumption before decoding the input. ## Details The parser's `ArrayBuffer` 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 (1)
- npm/devalue>= 5.1.0, < 5.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-22775
- PATCHhttps://github.com/sveltejs/devalue
- WEBhttps://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4
- WEBhttps://github.com/sveltejs/devalue/releases/tag/v5.6.2
- WEBhttps://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpf