{"id":"CVE-2026-2587","aliases":["GHSA-29wv-cv7p-xjc2"],"url":"https://o3.security/vulnerability/CVE-2026-2587","summary":"GlassFish's gadget handler is vulnerable to RCE","details":"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.","published":"2026-05-19T14:03:18.650Z","modified":"2026-08-12T03:51:34.377760162Z","cvss":{"score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":{"score":0.00646,"percentile":0.47837,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.glassfish.main.admingui:admingui","fixedVersion":"8.0.2"},{"ecosystem":"Maven","name":"org.glassfish.jsftemplating:jsftemplating","fixedVersion":"4.2.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2587.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2587"},{"type":"REPORT","url":"https://gitlab.eclipse.org/security/cve-assignment/-/issues/86"},{"type":"PACKAGE","url":"https://github.com/eclipse-ee4j/glassfish"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:34.377760162Z"}}