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.
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History
Fri, 13 Mar 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-843 | |
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threat_severity
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cvssV3_1
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Thu, 12 Mar 2026 14:15:00 +0000
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ssvc
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Thu, 12 Mar 2026 10:15:00 +0000
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Svelte
Svelte devalue |
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Svelte
Svelte devalue |
Wed, 11 Mar 2026 18:00:00 +0000
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| 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. | |
| Title | devalue has prototype pollution in devalue.parse and devalue.unflatten | |
| Weaknesses | CWE-1321 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-11T17:47:40.016Z
Updated: 2026-03-12T13:51:34.208Z
Reserved: 2026-03-04T17:23:59.797Z
Link: CVE-2026-30226
Updated: 2026-03-12T13:51:30.426Z
Status : Awaiting Analysis
Published: 2026-03-11T18:16:22.937
Modified: 2026-03-12T21:08:22.643
Link: CVE-2026-30226
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