Eclipse Grizzly <5.0.2 HTTP Request Smuggling via Malformed Trailer Header
CVE-2026-12606 Published on July 14, 2026
Eclipse Grizzly in versions before 5.0.2, cannot properly parse the trailer section in malformed trailer header's line, which can be leveraged to perform HTTP request smuggling.
Weakness Type
What is a HTTP Request Smuggling Vulnerability?
When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it.
CVE-2026-12606 has been classified to as a HTTP Request Smuggling vulnerability or weakness.
Products Associated with CVE-2026-12606
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Affected Versions
Eclipse Foundation Eclipse GlassFish:- Version 4.0.0, <= 4.0.2 is affected.
- Version 5.0.0 and below 5.0.2 is affected.