CVE-2026-30226
7.5 · HIGHOverview
CVE-2026-30226 is a high-severity vulnerability affecting svelte devalue. It was published on March 11, 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. In devalue v5.6.3 and earlier, devalue.parse and devalue.unflatten were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion. This vulnerability is fixed in 5.6.4.
Remediation
Check the references section for vendor advisories and patches from svelte. Update devalue to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| svelte | devalue | >= 0, < 5.6.4 | Affected |
Frequently Asked Questions
What is CVE-2026-30226?
CVE-2026-30226 is a high-severity vulnerability affecting svelte devalue. It was published on March 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-30226?
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-2026-30226?
Check the references section for vendor advisories and patches from svelte. Update devalue to the latest patched version. 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-2026-30226?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-30226 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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