CVE-2026-82258

MEDIUM CVSS 4.0: 5.9 EPSS 0.15%
Updated Aug 31, 2026
Svelte
Parameter Value
CVSS 5.9 (MEDIUM)
Affected Versions 2.38.0 — 2.60.1
Fixed In 2.60.1
Type CWE-362 (Race Condition)
Vendor Svelte
Public PoC No

SvelteKit versions from 2.38.0 before 2.60.1 contain a race condition in query.batch that allows concurrent requests from different users to merge under a single request context. Attackers can exploit specific timing conditions to access sensitive data from other users' concurrent requests.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
Passive
Minimal interaction

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v4.0

Weakness Type (CWE)

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Svelte Kit
cpe:2.3:a:svelte:kit:*:*:*:*:*:*:*:*
2.38.0 2.60.1
Svelte Sveltekit
cpe:2.3:a:svelte:sveltekit:*:*:*:*:*:node.js:*:*
2.38.0 2.60.1