Description
In Eclipse Jetty, the HTTP/1.1 parser is vulnerable to request smuggling when chunk extensions are used, similar to the "funky chunks" techniques outlined here: * https://w4ke.info/2025/06/18/funky-chunks.html * https://w4ke.info/2025/10/29/funky-chunks-2.html Jetty terminates chunk extension parsing at \r\n inside quoted strings instead of treating this as an error. POST / HTTP/1.1 Host: localhost Transfer-Encoding: chunked 1;ext="val X 0 GET /smuggled HTTP/1.1 ... Note how the chunk extension does not close the double quotes, and it is able to inject a smuggled request.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected products
- Eclipse / jetty9.4.0 – 9.4.60
- Eclipse Foundation / Eclipse Jetty12.0.0 – 12.0.32
- Eclipse Foundation / Eclipse Jetty11.0.0 – 11.0.27
- Eclipse Foundation / Eclipse Jetty12.1.0 – 12.1.6
- Eclipse Foundation / Eclipse Jetty9.4.0 – 9.4.59
- Eclipse Foundation / Eclipse Jetty11.0.0 – 11.0.28
- Eclipse Foundation / Eclipse Jetty10.0.0 – 10.0.27
Updated 16m ago · 8 sources