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Back to active CVEs
Low · CVSS 2.1CVE-2026-112945

Vite: Cross origin script execution through Vite custom middlewareCVE-2026-112945

Answer in brief

CVE-2026-112945 records a Low severity (CVSS 2.1) vulnerability in Vite: Cross origin script execution through Vite custom middleware. The current sources do not mark it as known exploited. The current feed maps vitejs/vite (generic), vitejs/vite-plus (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 Oct 20, 2026Updated Oct 20, 2026Source checked Oct 20, 2026First seen by HOL Oct 20, 2026Material review Oct 20, 2026
Upstream Advisory

Key facts

Risk
Low · CVSS 2.1
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 2.1. 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 vitejs/vite (generic), vitejs/vite-plus (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
vitejs/vitegeneric>=8.3.0 <8.3.3 || >=8.2.0 <8.2.4 || >=8.0.0 <8.1.6 || >=7.0.0 <7.3.7 || <6.4.46.4.4, 8.3.3, 8.2.4, 8.1.6, 7.3.7
vitejs/vite-plusgeneric<1.1.01.1.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for vitejs/vite, vitejs/vite-plus.
  2. 2Review the reported fix. Update vitejs/vite to 6.4.4; vitejs/vite-plus to 1.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 20, 2026

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

  2. Source modified

    Oct 20, 2026

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

  3. First seen by HOL

    Oct 20, 2026

Sources and claim methodology

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

Vite is a frontend tooling framework for JavaScript. Prior to 6.4.4, 7.3.7, 8.1.6, 8.2.4, and 8.3.3, applications using custom middleware are vulnerable when they pass an unchanged browser request URL to server.transformIndexHtml. getHtmlFilename uses the query-bearing request URL to resolve an existing local file while preserving attacker-supplied leading slashes in the generated proxy module URL. If the transformed HTML contains an inline module script and a victim browser loads the crafted development-server page, the leading double slash makes the browser fetch and execute an attacker-controlled module in the Vite-served page. This execution can expose sensitive page data or permit critical actions available to the affected application. This issue is fixed in versions 6.4.4, 7.3.7, 8.1.6, 8.2.4, and 8.3.3.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-80
Source
CVE List V5
Source checked
Oct 20, 2026
References
3 linked sources
Open source record