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CVE-2026-22774

7.5 · HIGH

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job.

Published Jan 15, 2026CWE-405EPSS 0.63%

Overview

CVE-2026-22774 is a high-severity vulnerability. It was published on January 15, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/sveltejs/devalue/commit/e46afa64dd2b25aa35fb905ba5d20cea63aabbf7GitHubgithub.com/sveltejs/devalue/releases/tag/v5.6.2GitHubgithub.com/sveltejs/devalue/security/advisories/GHSA-vw5p-8cq8-m7mvRefaccess.redhat.com/errata/RHSA-2026:2144Refaccess.redhat.com/errata/RHSA-2026:2926Refaccess.redhat.com/security/cve/CVE-2026-22774Refbugzilla.redhat.com/show_bug.cgi?id=2430095Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22774.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-22774?

CVE-2026-22774 is a high-severity vulnerability. It was published on January 15, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-22774?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-22774?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-22774?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-22774 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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