What is CVE-2026-2587?

CVE-2026-2587 is a critical-severity vulnerability in Eclipse Glassfish, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 9.6/10. Published 2026-05-19.

How severe is CVE-2026-2587?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Is CVE-2026-2587 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Eclipse Glassfish

CVE-2026-2587

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 cont…

Vulnerability class: Log4Shell (CVE-2021-44228)

EPSS: 0.001 (34.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Eclipse Glassfish
Eclipse Foundation Glassfish — versions 8.0.2, 8.0.0, 0

Weakness classification (CWE)

CWE-917 — Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection)

Public proof-of-concept exploits

Bhanunamikaze/CVE-2026-2587-Exploit-POC

References

emo@eclipse.org (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2026-2587?: CVE-2026-2587 is a critical-severity vulnerability in Eclipse Glassfish, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 9.6/10. Published 2026-05-19.
How severe is CVE-2026-2587?: Critical severity. CVSS v3 base score is 9.6 out of 10.
Is CVE-2026-2587 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.