CVE-2026-81176: medium-severity vulnerability in sveltejs devalue
Svelte devalue: DoS via malformed input
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
sveltejs · devalueRelated CVEs — sveltejs devalue
In the same product, most dangerous first.
CVE-2026-92708HIGHdevalue: Cross-request process memory disclosure in devalue when `stringify` / `uneval` serialize Node BuffersEPSS 0.7%CVE-2026-22775HIGHdevalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parseEPSS 0.6%CVE-2026-22774HIGHdevalue vulnerable to denial of service due to memory exhaustion in devalue.parseEPSS 0.6%CVE-2026-30226MEDIUMdevalue has prototype pollution in devalue.parse and devalue.unflattenEPSS 0.5%CVE-2026-42570HIGHSvelte devalue: DoS via sparse array deserializationEPSS 0.4%CVE-2025-57820HIGHSvelte devalue vulnerable to prototype pollutionEPSS 0.4%