CVE-2026-18662 In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, two or more security constraints with the same http
Attackers can bypass security constraints in Eclipse Jetty when multiple constraints share the same HTTP method omission without URL patterns, leading to unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-18662?
CVE-2026-18662 is a medium-severity missing authorization vulnerability, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, two or more security constraints with the same http-method-omission set, and no url-patterns, are not combined properly per Jakarta Servlet Spec.
Resulting in later http-method-omission sets overriding previous constraints with the same http-method-omission set.
Weakness: CWE-863
Which versions are affected by CVE-2026-18662?
How do I fix CVE-2026-18662?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18662 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18662 exists.
Sources
Also known as DEBIAN-CVE-2026-18662, GHSA-phjh-v7c6-g7mv, UBUNTU-CVE-2026-18662.