CVE-2026-22774: devalue vulnerable to denial of service due to memory 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 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.
Other sources
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.
— 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-2026-22774?
CVE-2026-22774 has a severity level classified as denial of service due to potential memory exhaustion.
How do I fix CVE-2026-22774?
To fix CVE-2026-22774, update the 'devalue' package to version 5.6.2 or later.
Which versions of devalue are affected by CVE-2026-22774?
CVE-2026-22774 affects devalue versions from 5.3.0 up to 5.6.1.
What causes the denial of service in CVE-2026-22774?
The denial of service in CVE-2026-22774 is caused by excessively high CPU and memory consumption when processing certain inputs with devalue.parse.
Is CVE-2026-22774 exploitable in production systems?
Yes, CVE-2026-22774 is exploitable in production systems that parse input from untrusted sources.