SvelteKit: Prototype pollution in file input deletion path in remote-function forms
If you use remote form functions, have an input field of type file, and accept arbitrary user-controlled path names for the field, then you are vulnerable to a prototype pollution attack where the attacker can remove e.g. methods on the prototype.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @sveltejs/kit | < 2.69.1 | 2.69.1 |
References
- https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x
- https://github.com/sveltejs/kit/pull/16218
- https://github.com/sveltejs/kit/commit/df32f6fe86cdd0b68b650e3e4631e5896453dcd3
- https://github.com/sveltejs/kit
- https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.69.1
- https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.0.0-next.7
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
@sveltejs/kit- Disclosed
- 24.07.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-866w-xmhq-wj7x - CC BY 4.0
Vulnerability history: @sveltejs/kit
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 17
- First → latest
- 04.2023 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 6
- Medium 8
- Low 3
Disclosures per year
- 2023: 2
- 2024: 3
- 2025: 1
- 2026: 11
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SvelteKit: Prototype pollution in file input deletion path in remote-function forms this entry
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