---
title: "CVE-2026-18660: Eclipse Jetty - Broken Access Control"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-18660/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-18660)

## 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](https://cwe.mitre.org/data/definitions/178.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-18660](https://nvd.nist.gov/vuln/detail/CVE-2026-18660)
- [https://github.com/jetty/jetty.project/security/advisories/GHSA-7wfj-j486-mxrf](https://github.com/jetty/jetty.project/security/advisories/GHSA-7wfj-j486-mxrf)
- [https://gitlab.eclipse.org/security/cve-assignment/-/work\_items/212](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/212)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)