Medium severity · published Aug 28, 2026
CVE-2026-82258
SvelteKit 2.38.0 before 2.60.1 Cross-User Data Disclosure via query.batch
4.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
kit · sveltejs
2.38.0 before 2.60.1 · source: vendor
SV
Sveltekit · Svelte
2.38.0 before 2.60.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82258
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82258
vendor-advisory
https://github.com/sveltejs/kit/security/advisories/GHSA-hgv7-v322-mmgr
third-party-advisory
https://www.vulncheck.com/advisories/sveltekit-2.38.0-before-2.60.1-cross-user-data-disclosure-via-query-batch
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