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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Eclipse Foundation | Eclipse Glassfish | 7.0.0 – < 7.0.26, 7.1.0 – < 7.1.1, 8.0.0 – < 8.0.2 | 7.0.26 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
Bhanunamikaze/CVE-2026-2587-Exploit-POC ★ 1 · May 20, 2026
CVE-2026-2587 PoC validator for Eclipse GlassFish EL Injection RCE in the admin console gadget.jsf handler. Safe authenticated vulnerability scanner for authorized testing.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.glassfish.jsftemplating:jsftemplating | < 4.2.0 | 4.2.0 | GHSA-29wv-cv7p-xjc2 |
| Maven | org.glassfish.main.admingui:admingui | < 8.0.2 | 8.0.2 | GHSA-29wv-cv7p-xjc2 |