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Back to active CVEs
Medium · CVSS 5.3CVE-2026-82257

SvelteKit before 2.69.1 Prototype Pollution via File InputCVE-2026-82257

Answer in brief

CVE-2026-82257 records a Medium severity (CVSS 5.3) vulnerability in SvelteKit before 2.69.1 Prototype Pollution via File Input. The current sources do not mark it as known exploited. The current feed maps sveltejs/kit (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Oct 8, 2026Source checked Oct 12, 2026First seen by HOL Aug 28, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps sveltejs/kit (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:svelte:sveltekit:*:*:*:*:*:node.js:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
sveltejs/kitgeneric>=0 <2.69.12.69.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for sveltejs/kit.
  2. 2Review the reported fix. Update sveltejs/kit to 2.69.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 28, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • hex_core's default HTTP adapter doesn't verify TLS certificates on OTP 24 and 25Same generic ecosystem
  • ImageMagick before 7.1.2-33 Policy Bypass via Symlink in IsRightsAuthorizedByNameSame generic ecosystem
  • Yungengxin Cloud Billing IOCTL Process Termination LWBilling64.sys sub_14000443C exposed ioctl with insufficient access controlSame generic ecosystem
  • BlackBeltTechnology pi-agent-dashboard Terminal terminal-handler.ts terminalManager.spawn improper authorizationSame generic ecosystem
  • Linksys E1700 Mac Filter ssid1MACFilter stack-based overflowSame generic ecosystem
  • Linksys E1700 setVlan stack-based overflowSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-1321
Source
CVE List V5
Source checked
Oct 12, 2026
References
2 linked sources
Open source record