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.
Affected products
eclipse: jetty
References10
- github.com/jetty/jetty.project/security/advisories/GHSA-355h-qm… ExploitMitigationVendor Advisory
- gitlab.eclipse.org/security/cve-assignment/-/issues/89 Issue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:10175
- access.redhat.com/errata/RHSA-2026:14272
- access.redhat.com/errata/RHSA-2026:17668
- access.redhat.com/errata/RHSA-2026:20568
- access.redhat.com/errata/RHSA-2026:21773
- access.redhat.com/errata/RHSA-2026:22453
- access.redhat.com/errata/RHSA-2026:25089
- access.redhat.com/errata/RHSA-2026:50221
Metrics
- CVSS 3.1
-
9.1
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS — exploit probability
- 1% percentile: 72 · as of 12 November 2026
- CWE
- CWE-444
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