CVE-2026-82257
mediumpriority · track · 17EPSS 0.004 · 29 %ileUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.3–5.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-866w-xmhq-wj7xSvelteKit: Prototype pollution in file input deletion path in remote-function forms2026-07-24ghsa · osvUS
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.
sources
Which sources assert this record, and when.
references (2) nvd
External citations — patches, advisories, analysis.
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