What’s Vulnerable › Vulnerabilities

CVE-2026-18660: Jetty proxy blacklist performs case-sensitive matching of case-insensitive DNS hostnames

• Severity: high (CVSS 8.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-15
• Weakness: CWE-178

Description

In Eclipse Jetty, across various versions of `jetty-server`, and `jetty-proxy`, the host whitelist/blacklist is case-sensitive, and would allow hosts through that only differ by case.

Affected products

• Eclipse Foundation org.eclipse.jetty:jetty-proxy: from 11.0.0 through 11.0.32; from 10.0.0 through 10.0.32; from 9.0.0 through 9.4.64
• Eclipse Foundation org.eclipse.jetty:jetty-server: from 12.1.0 through 12.1.11; from 12.0.0 through 12.0.38

References

• https://github.com/jetty/jetty.project/security/advisories/GHSA-7wfj-j486-mxrf
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/212
• https://github.com/jetty/jetty.project/security/advisories/GHSA-7wfj-j486-mxrf

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