CVE-2026-22775: devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse
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.
Other sources
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.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
npm/devalueto a version that resolves this vulnerability.Fixed in 5.6.2 - Upgrade
Upgrade
devalueto a version that resolves this vulnerability.Fixed in 5.6.2
Event History
Frequently Asked Questions
What is the severity of CVE-2026-22775?
CVE-2026-22775 has been classified as a denial of service vulnerability due to memory or CPU exhaustion.
How do I fix CVE-2026-22775?
To address CVE-2026-22775, upgrade devalue to version 5.6.2 or later.
What versions are affected by CVE-2026-22775?
CVE-2026-22775 affects devalue versions from 5.1.0 to 5.6.1.
What are the potential impacts of CVE-2026-22775?
The potential impacts of CVE-2026-22775 include application crashes and performance degradation due to excessive CPU usage.
What is devalue and its role in CVE-2026-22775?
Devalue is a JavaScript library that serializes values, and CVE-2026-22775 exploits its parsing function to cause denial of service.