Improper Handling of Case Sensitivity Affecting github.com/dunglas/frankenphp/caddy package, versions >=1.11.2 <1.12.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMDUNGLASFRANKENPHPCADDY-16726402
- published17 May 2026
- disclosed15 May 2026
- creditKC1zs4, chenjj
Introduced: 15 May 2026
CVE-2026-45062 (opens in a new tab)How to fix?
Upgrade github.com/dunglas/frankenphp/caddy to version 1.12.3 or higher.
Overview
Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity through improper handling of Unicode characters in the splitPos function. An attacker can execute arbitrary code by uploading a file with a specially crafted name containing non-ASCII bytes or Unicode lookalike characters and then accessing it via a crafted URL. This is only exploitable if the attacker can place content into a file served by the application, such as through upload endpoints or user-controlled file storage.