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TI-2026-56722 Aliases CVE-2026-82257GHSA-6mgf-42wv-8j7p

SvelteKit before 2.69.1 Prototype Pollution via File Input

Priority LOW 24CWE-1321Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

SvelteKit versions before 2.69.1 contain a prototype pollution vulnerability in remote form functions with file input fields that accept arbitrary user-controlled path names. Attackers can manipulate the deletion path to remove methods on the prototype, potentially disabling application functionality.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Fix Fixed kit (sveltejs): 2.69.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sveltejskitbefore 2.69.12.69.1Patch availableCNA
  • kit Vendorsveltejs Affected before 2.69.1 Fixed in 2.69.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:svelte:sveltekit:*:*:*:*:*:node.js:*:*before 2.69.1Vulnerablesveltejs
  • cpe:2.3:a:svelte:sveltekit:*:*:*:*:*:node.js:*:* Versions before 2.69.1 Vulnerable ·sveltejs

Remediation

  • Fix · CNA kit (sveltejs) Fixed in 2.69.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    sveltejs kit 2.69.1

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-56721 SvelteKit before 2.69.1 Denial of Service via Remote FormPriority LOW 37
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82257
  2. 2026-10-03 Alias added: GHSA-6mgf-42wv-8j7p

References

Advisory 1

  • TI-2023-13469 SvelteKit framework has Insufficient CSRF protection for CORS requests CVSS 3.1HIGH 8.8
  • TI-2023-13464 SvelteKit has Insufficient Cross-Site Request Forgery Protection CVSS 3.1HIGH 8.8
  • TI-2026-56726 SvelteKit before 2.52.2 CPU Exhaustion via Remote Form Deserialization CVSS 4.0HIGH 8.7
  • TI-2026-56725 SvelteKit before 2.52.2 Memory Exhaustion via Remote Form Deserialization CVSS 4.0HIGH 8.7
  • TI-2026-56724 SvelteKit 2.49.0 before 2.53.3 Denial of Service via form CVSS 4.0HIGH 8.7
  • TI-2026-56721 SvelteKit before 2.69.1 Denial of Service via Remote Form CVSS 4.0MEDIUM 6.9
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences