CVE-2026-2587: A critical Remote Code Execution (RCE) vulnerability was identified in the server-side template rendering mech

Q: How do I fix CVE-2026-2587?

glassfish: upgrade to 8.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-2587 being exploited?

CVE-2026-2587 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-2587 affect?

CVE-2026-2587 affects glassfish. Severity is critical (CVSS 9.6). 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 conte

Q: How urgent is CVE-2026-2587?

Priority 51/100. Critical severity; Public exploit reference

This month

CRITICAL 9.6UPGRADE

CVE-2026-2587 is a critical-severity flaw (CVSS 9.6) affecting glassfish. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-917
Published	2026-05-19
Last modified	2026-07-24

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-19 15:16 UTCPublished CVE record published
2026-07-24 12:10 UTCUpdated Record last modified

eclipse glassfish UPGRADE

Affected: < 8.0.2

Fixed in: 8.0.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy glassfish || rpm -q glassfish || glassfish --version

2. UPGRADE to 8.0.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade glassfish

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade glassfish

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2587?

glassfish: upgrade to 8.0.2. Exact commands for each OS are on this page.

Is CVE-2026-2587 being exploited?

CVE-2026-2587 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2587 affect?

CVE-2026-2587 affects glassfish. Severity is critical (CVSS 9.6). 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 conte

How urgent is CVE-2026-2587?

Priority 51/100. Critical severity; Public exploit reference

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References

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