CVE-2026-128119

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

Published Nov 13, 2026 CVSS 3.1 · 5.9 Medium EPSS n/a KEV · Not listed

Description

SvelteKit 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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

sveltejs

kit

affected

Version	Status	Constraints
`>= 2.60.1, < 3.1.1`	affected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/sveltejs/kit/commit/2c190febe78a15cac21be539ed9e99dc2d414b60
https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.1.1
https://github.com/sveltejs/kit/security/advisories/GHSA-6cf5-gc4q-fm3x

History

Nov 13, 2026 7:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		SvelteKit 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.
Title		SvelteKit: Private `query.batch` functions could collide, producing unexpected parameter / function combinations
Weaknesses		CWE-863
References		https://github.com/sveltejs/kit/commit/2c190febe78a15cac21be539ed9e99dc2d414b60 https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.1.1 https://github.com/sveltejs/kit/security/advisories/GHSA-6cf5-gc4q-fm3x
Metrics		cvssV3_1 `{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}`