How severe is CVE-2026-82256?

CVE-2026-82256 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-82256 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-82256?

CVE-2026-82256 affects Svelte Sveltekit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-82256?

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

When was CVE-2026-82256 published?

CVE-2026-82256 was published on 2026-08-28 and last updated on 2026-08-31.

CVE-2026-82256

CVE-2026-82256 is a medium-severity vulnerability in Svelte Sveltekit with a CVSS 3.x base score of 5.3. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Svelte Sveltekit
Published: 2026-08-28
Last modified: 2026-08-31

Description

SvelteKit before 2.69.1 fails to properly validate remote form function payload sizes, allowing attackers to crash the Node process by sending large payloads. Repeated exploitation causes denial of service by repeatedly crashing the application process.

Frequently asked questions

What is CVE-2026-82256?: SvelteKit before 2.69.1 fails to properly validate remote form function payload sizes, allowing attackers to crash the Node process by sending large payloads. Repeated exploitation causes denial of service by repeatedly crashing the application process.
How severe is CVE-2026-82256?: CVE-2026-82256 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-82256 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-82256?: CVE-2026-82256 affects Svelte Sveltekit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-82256?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-82256 published?: CVE-2026-82256 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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