CVE-2026-82258CWE-362

CVE-2026-82258

Medium · published August 28, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
13.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
5.9 · 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
EPSS
0.00235 · 13.6th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-08-28T16:16Z
Affected products (1)
ProductVersionsFixed in
svelte/sveltekit≥ 2.38.0, < 2.60.12.60.1
References (2)
https://github.com/sveltejs/kit/security/advisories/GHSA-hgv7-v322-mmgr · [email protected]https://www.vulncheck.com/advisories/sveltekit-2.38.0-before-2.60.1-cross-user-data-disclosure-via-query-batch · [email protected]
EPSS history
Timeline
  • 30 AUG 16:19Z
    EPSS moved — → 0%
    epss
  • 28 AUG 10:49Z
    SvelteKit 2.38.0 before 2.60.1 Cross-User Data Disclosure via query.batch
    cvelistv5