SvelteKit: Private `query.batch` functions could collide, producing unexpected parameter / function combinations

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-128119
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-13 20:18:56 UTC
Updated2026-11-13 22:14:15 UTC
DescriptionSvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 2.60.1 until 3.1.1, applications using the experimental remote functions flag could assign the same generated identifier to separate non-exported query.batch functions. When those private functions shared a request batch, arguments intended for one function could be passed to another function, causing unexpected cross-function processing and possible disclosure of function arguments. This issue is fixed in 3.1.1.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.002850000 probability, percentile 0.213010000 (date 2026-11-14)

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sveltejs Kit affected >= 2.60.1, < 3.1.1 Not specified

References

ReferenceSourceLinkTags
github.com/sveltejs/kit/security/advisories/GHSA-6cf5-gc4q-fm3x [email protected] github.com
github.com/sveltejs/kit/commit/2c190febe78a15cac21be539ed9e99dc2d414b60 [email protected] github.com
github.com/sveltejs/kit/releases/tag/@sveltejs/[email protected] [email protected] github.com
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