What’s Vulnerable › Vulnerabilities

CVE-2026-18659: Unauthenticated authorization bypass in ConstraintSecurityHandler - HTTP method-omission matched by substring

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-863

Description

In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, and `jetty-eeN-servlet`, the Jakarta Spec constraints defined as `http-method-omission` can be bypassed by using substrings of the defined HTTP Methods.

Affected products

• Eclipse Foundation org.eclipse.jetty.ee10:jetty-ee10-servlet: from 12.1.0 through 12.1.11; from 12.0.0 through 12.0.38
• Eclipse Foundation org.eclipse.jetty.ee11:jetty-ee11-servlet: from 12.1.0 through 12.1.11
• Eclipse Foundation org.eclipse.jetty.ee8:jetty-ee8-security: from 12.1.0 through 12.1.11; from 12.0.0 through 12.0.38
• Eclipse Foundation org.eclipse.jetty.ee9:jetty-ee9-security: from 12.1.0 through 12.1.11; from 12.0.0 through 12.0.38
• Eclipse Foundation org.eclipse.jetty:jetty-security: from 11.0.0 through 11.0.32; from 10.0.0 through 10.0.32; from 7.6.13 through 9.4.64

References

• https://github.com/jetty/jetty.project/security/advisories/GHSA-53x7-f9fc-h7qr
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/214
• https://github.com/jetty/jetty.project/security/advisories/GHSA-53x7-f9fc-h7qr

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