How severe is CVE-2026-82258?

CVE-2026-82258 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-82258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-82258?

CVE-2026-82258 affects Svelte Sveltekit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-82258?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-82258 published?

CVE-2026-82258 was published on 2026-08-28 and last updated on 2026-08-31.

CVE-2026-82258

CVE-2026-82258 is a medium-severity vulnerability in Svelte Sveltekit with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v4: 5.9
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Svelte Sveltekit
Published: 2026-08-28
Last modified: 2026-08-31

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.

Frequently asked questions

What is CVE-2026-82258?: 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.
How severe is CVE-2026-82258?: CVE-2026-82258 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-82258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-82258?: CVE-2026-82258 affects Svelte Sveltekit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-82258?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-82258 published?: CVE-2026-82258 was published on 2026-08-28 and last updated on 2026-08-31.

References

Affected products (1)

cpe:2.3:a:svelte:sveltekit:*:*:*:*:*:node.js:*:*

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