CVE-2026-30226

HIGH
2026-03-11 [email protected] GHSA-cfw5-2vxh-hr84
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
CVE Published
Mar 11, 2026 - 18:16 nvd
HIGH 7.5

Tags

Denial Of Service Prototype Pollution Devalue

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.

Analysis

In devalue v5.6.3, `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.

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Remediation

Within 7 days: Identify all affected systems running devalue and apply vendor patches promptly. Monitor vendor channels for patch availability.

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0

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CVE-2026-30226 vulnerability details – vuln.today
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