CVE-2026-22775

HIGH

7.5

Description

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/15/2026

Last Modified1/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

svelte:devalue

Weaknesses (CWE)

CWE-405

References

https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4(security-advisories@github.com)

https://github.com/sveltejs/devalue/releases/tag/v5.6.2(security-advisories@github.com)

https://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpf(security-advisories@github.com)

IOC Correlations

No correlations recorded

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