CVE-2026-81176— Svelte devalue: DoS via malformed input
Quick assessment
Affected
sveltejs devalue
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. Prior to 5.9.2, devalue.parse does not reject out-of-bounds indices that are greater than or equal to values.length in src/parse.js. A
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I. Basic Information for CVE-2026-81176
Vulnerability Information
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Vulnerability Title
Svelte devalue: DoS via malformed input
Source: CVE Program / CVE List V5
Vulnerability Description
Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. Prior to 5.9.2, devalue.parse does not reject out-of-bounds indices that are greater than or equal to values.length in src/parse.js. A specially crafted untrusted payload can make the parser alternate between array representations, producing quadratic work as the payload grows and causing denial of service in applications that parse untrusted devalue data. This issue is fixed in version 5.9.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-81176
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Patches & Fixes for CVE-2026-81176 (1)
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Merge commit from fork · sveltejs/devalue@8b2a456 · GitHub x_refsource_MISC
Other References for CVE-2026-81176 (2)
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Release v5.9.2 · sveltejs/devalue · GitHub x_refsource_MISC
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DoS via malformed input · Advisory · sveltejs/devalue · GitHub x_refsource_CONFIRM
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V. Comments for CVE-2026-81176
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