CVE-2026-82257: medium-severity vulnerability in sveltejs kit
SvelteKit before 2.69.1 Prototype Pollution via File 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 0.4%
SvelteKit versions before 2.69.1 contain a prototype pollution vulnerability in remote form functions with file input fields that accept arbitrary user-controlled path names. Attackers can manipulate the deletion path to remove methods on the prototype, potentially disabling application functionality.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products
sveltejs · kitRelated CVEs — sveltejs kit
In the same product, most dangerous first.
CVE-2024-23641HIGHSending a GET or HEAD request with a body crashes SvelteKitEPSS 0.8%CVE-2026-22803HIGHSvelteKit has a memory amplification DoS in Remote Functions binary form deserializerEPSS 0.6%CVE-2023-29003HIGHSvelteKit has Insufficient Cross-Site Request Forgery ProtectionEPSS 0.6%CVE-2026-40073HIGHSvelteKit has a BODY_SIZE_LIMIT bypass in @sveltejs/adapter-nodeEPSS 0.5%CVE-2026-82259HIGHSvelteKit 2.49.0 before 2.53.3 Denial of Service via formEPSS 0.5%CVE-2025-67647HIGHSvelteKit Denial of service and possible SSRF when using prerenderingEPSS 0.5%