CVE-2026-2587
CriticalCVSS 9.6Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% of all known CVEs
Summary
A critical remote code execution vulnerability in the server-side template rendering mechanism used by the Glassfish gadget handler allows an attacker to inject EL expressions, leading to full host compromise.
Risk Assessment
An attacker can read/modify data, execute arbitrary commands, establish persistence, and move laterally, posing a serious threat to the entire infrastructure.
Recommendation
Immediately update Eclipse GlassFish to version 8.0.2, 7.1.1, or 7.0.26 depending on the branch, and disable unnecessary gadget handlers.
Original NVD description (English source)
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.