Review reviewHigh

CVE-2026-22774

sveltejs devalue, Red Hat Trusted Artifact Signer 1.2, Red Hat Trusted Artifact Signer 1.3

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: 7.5
EPSS: 0.57%
CISA KEV: Not listed
Published: 2026.01.16

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.57%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: sveltejs devalue, Red Hat Trusted Artifact Signer 1.2, Red Hat Trusted Artifact Signer 1.3
Affected versions: >= >= 5.3.0, < 5.6.2, >= 5.3.0 < 5.6.2
Fixed versions: 5.6.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that sveltejs devalue, Red Hat Trusted Artifact Signer 1.2, Red Hat Trusted Artifact Signer 1.3 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-405