CVE-2026-82258 | BDVDB-2026-366187 Detail

sveltejskit

Description#

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.

Impact#

Per CVSS v4.0: confidentiality impact high, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

References#

Exploit#

No public exploit known

History#

Version 12026-08-28Record published in the CVE List.
Version 22026-10-08Most recent update recorded in the CVE List.

Published

Published: 2026-08-28
Last modified: 2026-10-08

Vendor information

Vendor: sveltejs
Product: kit

All sveltejs vulnerabilities

Score

5.9 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 14.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Race Condition

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.38.0 and < 2.60.1
Fixed
2.60.1
Vulnerable
Not stated
Fixed
2.60.1

Scoring System

CVSS v4.0

5.9 Medium

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Attack Requirements	Present
Privileges Required	Low
User Interaction	Passive
Vulnerable System Confidentiality	High
Vulnerable System Integrity	Low
Vulnerable System Availability	None
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).