Improper Handling of Case Sensitivity Affecting org.eclipse.jetty:jetty-server package, versions [12.0.0-alpha0, 12.0.39)[12.1.0-alpha0, 12.1.12)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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- published19 Oct 2026
- disclosed15 Oct 2026
- credit4ra1n, pyn3rd, unam4
Introduced: 15 Oct 2026
NewCVE-2026-18660 (opens in a new tab)How to fix?
Upgrade org.eclipse.jetty:jetty-server to version 12.0.39, 12.1.12 or higher.
Overview
org.eclipse.jetty:jetty-server is a lightweight highly scalable java based web server and servlet engine.
Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity due to improper handling of hostnames in the proxy process. An attacker can bypass access restrictions by supplying hostnames that differ only in letter casing.