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CVE-2026-22774

devalue vulnerable to denial of service due to memory exhaustion in devalue.parse

Published: Jan 15, 2026Updated: Jan 20, 2026 Sources: CVE List NVD GHSACWE-405
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 61.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-405

Affected Products

devaluesveltejs
Library
OSS Libraries / web-framework
devaluenpmOSS Libraries
devaluesvelte
Library
OSS Libraries / web-framework
sveltejsoss-projectOSS Libraries
npmpackage-ecosystemOSS Libraries
svelteoss-projectOSS Librariesaka kit, sveltekit

Exploitability

Official Patch Available

References

https://github.com/sveltejs/devalue/security/advisories/GHSA-vw5p-8cq8-m7mv
github.com
https://github.com/sveltejs/devalue/commit/e46afa64dd2b25aa35fb905ba5d20cea63aabbf7
github.com
https://github.com/sveltejs/devalue/releases/tag/v5.6.2
github.com
and 3 more references View all →

Timeline

Published
Jan 15, 2026
Last Updated
Jan 20, 2026

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