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Vulnerability · Published Oct 15, 2026 · Assigned by eclipse

CVE-2026-18661

High 8.8

In plain English

A high-severity incorrect authorization in org.eclipse.jetty.ee10:jetty-ee10-annotations from Eclipse Foundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.8High
Exploit odds (30 days)0.4%top 63.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

In Eclipse Jetty, across various versions of `jetty-annotations`, and `jetty-eeN-annotations`, the Jakarta Spec authoritative url-pattern rules for mixed `@ServletSecurity` annotation, and `web.xml` defined `security-constraint` on the same `url-pattern` were not being applied if the `web.xml` had more than 1 `url-pattern` for a servlet, and had a `security-constraint` applying to only some of those `url-pattern` definitions.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13jetty12no fix listedDEBIAN-CVE-2026-18661
Debian:14jetty1212.0.39-1DEBIAN-CVE-2026-18661
Debian:12jetty9no fix listedDEBIAN-CVE-2026-18661
Debian:13jetty9no fix listedDEBIAN-CVE-2026-18661
Debian:14jetty9no fix listedDEBIAN-CVE-2026-18661

Affected products (as reported)

VendorProductVersions
Eclipse Foundation org.eclipse.jetty.ee11:jetty-ee11-annotations 12.1.0 – through 12.1.11
Eclipse Foundation org.eclipse.jetty.ee10:jetty-ee10-annotations 12.1.0 – through 12.1.1112.0.0 – through 12.0.38
Eclipse Foundation org.eclipse.jetty.ee9:jetty-ee9-annotations 12.1.0 – through 12.1.1112.0.0 – through 12.0.38
Eclipse Foundation org.eclipse.jetty.ee8:jetty-ee8-annotations 12.1.0 – through 12.1.1112.0.0 – through 12.0.38
Eclipse Foundation org.eclipse.jetty:jetty-annotations 11.0.0 – through 11.0.3210.0.0 – through 10.0.329.4.0 – through 9.4.64

Weakness: CWE-863 · 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

References