A critical Remote Code Execution (RCE) vulnerability was identified in the server-side template rendering mechanism used by the Glassfish gadget handler. The application processes .xml files and evaluates user-supplied values within a context where Expression Language (EL) “expressions” are processed without proper sanitization or escaping. By injecting expressions such as #{7*7}, the server returns 49, confirming server-side EL evaluation. This issue allows a remote attacker to fully compromise the underlying host, enabling capabilities as reading/modifying data, executing arbitrary commands, persistence, and lateral movement.

A critical Remote Code Execution (RCE) vulnerability was identified in the server-side template rendering mechanism used by the Glassfish gadget handler. The application processes .xml files and evaluates user-supplied values within a context where Expression Language (EL) “expressions” are processed without proper sanitization or escaping. By injecting expressions such as #{7*7}, the server returns 49, confirming server-side EL evaluation. This issue allows a remote attacker to fully compromise the underlying host, enabling capabilities as reading/modifying data, executing arbitrary commands, persistence, and lateral movement. This issue affects Eclipse GlassFish: from 8.0.0 to 8.0.1, fixed in 8.0.2; 7.1.0, fixed in 7.1.1; from 7.0.0 to 7.0.25, fixed in 7.0.26. Impact on versions from 5.1.0 to 6.2.5 is unknown.

[{"vendor":"Eclipse Foundation","product":"Eclipse Glassfish","defaultStatus":"affected","repo":"https://github.com/eclipse-ee4j/glassfish","versions":[{"version":"8.0.2","lessThanOrEqual":"*","versionType":"semver","status":"unaffected"}]}]

[{"vendor":"Eclipse Foundation","product":"Eclipse Glassfish","defaultStatus":"unaffected","repo":"https://github.com/eclipse-ee4j/glassfish","versions":[{"version":"5.1.0","lessThanOrEqual":"6.2.5","versionType":"semver","status":"unknown"},{"version":"7.0.0","lessThan":"7.0.26","versionType":"semver","status":"affected"},{"version":"7.1.0","lessThan":"7.1.1","versionType":"semver","status":"affected"},{"version":"8.0.0","lessThan":"8.0.2","versionType":"semver","status":"affected"}]}]

{"timestamp":"2026-05-19T00:00:00+00:00","id":"CVE-2026-2587","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Eclipse Foundation","product":"Eclipse Glassfish","defaultStatus":"affected","repo":"https://github.com/eclipse-ee4j/glassfish","versions":[{"version":"8.0.2","lessThanOrEqual":"*","versionType":"semver","status":"unaffected"}]}]

OR
          *cpe:2.3:a:eclipse:glassfish:*:*:*:*:*:*:*:* versions up to (excluding) 8.0.2

Eclipse Foundation: https://gitlab.eclipse.org/security/cve-assignment/-/issues/86 Types: Exploit, Issue Tracking, Third Party Advisory

A critical Remote Code Execution (RCE) vulnerability was identified in the server-side template rendering mechanism used by the Glassfish gadget handler. The application processes .xml files and evaluates user-supplied values within a context where Expression Language (EL) “expressions” are processed without proper sanitization or escaping. By injecting expressions such as #{7*7}, the server returns 49, confirming server-side EL evaluation. This issue allows a remote attacker to fully compromise the underlying host, enabling capabilities as reading/modifying data, executing arbitrary commands, persistence, and lateral movement.

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CWE-917

https://gitlab.eclipse.org/security/cve-assignment/-/issues/86