CVE-2026-2587
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.glassfish.main.admingui:adminguiMaven | < 8.0.2 | 8.0.2 |
org.glassfish.jsftemplating:jsftemplatingMaven | < 4.2.0 | 4.2.0 |
Affected products
2Patches
Vulnerability mechanics
References
4- gitlab.eclipse.org/security/cve-assignment/-/issues/86nvdExploitIssue TrackingThird Party AdvisoryWEB
- github.com/advisories/GHSA-29wv-cv7p-xjc2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-2587ghsaADVISORY
- github.com/eclipse-ee4j/glassfish/releases/tag/8.0.2ghsaWEB
News mentions
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