CVE-2026-2587Network attack vector

Remote code execution via gadget EL evaluation

Published May 19, 2026 · Updated May 19, 2026

Expression Language injection in Eclipse GlassFish allows remote attackers to execute host commands through the Admin Console. The gadget.jsf handler fetches attacker-selected XML and evaluates expressions in ModulePrefs attributes with access to constructors, static methods, class objects, and static fields. Exploitation requires either direct Admin Console authentication or interaction from a logged-in administrator through CSRF, after which Java runtime access permits arbitrary host commands.

CVSS severity9.6
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Expression Language injection in Eclipse GlassFish allows remote attackers to execute host commands through the Admin Console. The gadget.jsf handler fetches attacker-selected XML and evaluates expressions in ModulePrefs attributes with access to constructors, static methods, class objects, and static fields. Exploitation requires either direct Admin Console authentication or interaction from a logged-in administrator through CSRF, after which Java runtime access permits arbitrary host commands.

The record

CVE
CVE-2026-2587
Published
May 19, 2026
Updated
May 19, 2026
Vendor
The Eclipse Foundation
Product
Eclipse GlassFish
Classifications
CWE-917, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.1.0
  2. Affected versionversion=8.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse GlassFishversion=0 <7.1.0; version=8.0.0

Published CVSS scores

9.6Eclipse FoundationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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