Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Eclipse | Glassfish | < 8.0.2 |
Related Weaknesses (CWE)
References
- https://gitlab.eclipse.org/security/cve-assignment/-/issues/86ExploitIssue TrackingThird Party Advisory
FAQ
What is CVE-2026-2587?
CVE-2026-2587 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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 evalu...
How severe is CVE-2026-2587?
CVE-2026-2587 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-2587?
Check the references section above for vendor advisories and patch information. Affected products include: Eclipse Glassfish.