CVE-2026-18660 Eclipse Jetty - Broken Access Control

Eclipse Jetty jetty-server and jetty-proxy contain a broken access control caused by case-sensitive host whitelist/blacklist, letting attackers bypass host restrictions by using case variations, exploit requires no special privileges.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
15 October 2026
Updated
15 October 2026
Weakness
CWE-178

Vendor fix

Update to the latest version where host whitelist/blacklist is case-insensitive.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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