HTTP Request Smuggling via Chunked Extension Quoted-String Parsing

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Summary

CVECVE-2026-2332
StatePUBLISHED
Assignereclipse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-14 12:16:21 UTC
Updated2026-04-14 12:16:21 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.000310000 probability, percentile 0.087050000 (date 2026-04-14)

Problem Types: CWE-444 | CWE-444 CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSS7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Eclipse Foundation Eclipse Jetty affected 12.1.0 12.1.6 semver Not specified
CNA Eclipse Foundation Eclipse Jetty affected 12.0.0 12.0.32 semver Not specified
CNA Eclipse Foundation Eclipse Jetty affected 11.0.0 11.0.27 semver Not specified
CNA Eclipse Foundation Eclipse Jetty affected 10.0.0 10.0.27 semver Not specified
CNA Eclipse Foundation Eclipse Jetty affected 9.4.0 9.4.59 semver Not specified

References

ReferenceSourceLinkTags
github.com/jetty/jetty.project/security/advisories/GHSA-355h-qmc2-wpwf [email protected] github.com
gitlab.eclipse.org/security/cve-assignment/-/issues/89 [email protected] gitlab.eclipse.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: https://github.com/xclow3n (en)

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