CVE-2026-12605
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CSRF and SSRF in Eclipse GlassFish Admin Console

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: Eclipse Foundation

Description
In Eclipse GlassFish versions 8.0.x before 8.0.4, CSRF + SSRF in DownloadServlet ContentSources leaks the admin `gfresttoken` to attacker-controlled host if the victim is authenticated into the Admin Console -\> full unauthenticated takeover of Eclipse GlassFish domain until the token expires.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-12605
EUVD
EUVD-2026-53925

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
eclipse glassfish From 8.0.0 (inc) to 8.0.3 (inc)
eclipse glassfish 8.0.2
eclipse glassfish 8.0.3
eclipse glassfish 8.0.4

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

CVE-2026-12605 is a critical vulnerability in Eclipse GlassFish versions 8.0.0 through 8.0.3. It combines Cross-Site Request Forgery (CSRF) and Server-Side Request Forgery (SSRF) in the DownloadServlet component of the Admin Console. An attacker can trick an authenticated admin into loading a malicious URL, causing the admin's REST token (gfresttoken) to be sent to an attacker-controlled host. This token can then be used to gain full unauthenticated admin access to the GlassFish domain until the token expires.

Detection Guidance

Check GlassFish admin console logs for suspicious DownloadServlet requests with external restUrl parameters. Monitor network traffic on port 4848 for outbound connections to unexpected hosts. Look for admin gfresttoken values in HTTP responses or logs.

Impact Analysis

This vulnerability allows an attacker to fully compromise an Eclipse GlassFish server. Once the admin's gfresttoken is stolen, the attacker can perform administrative actions, including deploying malicious applications for remote code execution (RCE) as the GlassFish process user. The attack can be executed from any host once the token is obtained, and the token remains valid even after password rotation or browser closure.

Compliance Impact

This vulnerability could lead to severe compliance violations under GDPR and HIPAA due to unauthorized access to sensitive data and administrative controls. A full server takeover may result in data breaches, unauthorized modifications, or disclosure of protected health information, potentially leading to legal penalties, reputational damage, and loss of certification.

Mitigation Strategies

Upgrade to GlassFish 8.0.4 or later. Restrict access to the admin console (port 4848) to trusted networks only. Implement allow-listing for restUrl parameters to prevent external host access. Add CSRF protection to DownloadServlet.

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