CVE-2026-2332: In Eclipse Jetty, the HTTP/1.1 parser is vulnerable to request smuggling when chunk extensions are used, simil

This week

HIGH 7.4REMOTEUPGRADE

CVE-2026-2332 is a high-severity flaw (CVSS 7.4) affecting jetty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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="

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-444
Published	2026-04-14
Last modified	2026-10-26

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 12:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

eclipse jetty UPGRADE

Affected: >= 9.4.0 and < 9.4.60 · >= 10.0.0 and < 10.0.28 · >= 11.0.0 and < 11.0.28 · >= 12.0.0 and < 12.0.33 · >= 12.1.0 and < 12.1.7

Fixed in: 9.4.60, 10.0.28, 11.0.28, 12.0.33, 12.1.7

Safe to downgrade to: a release before 9.4.0

1. Check installed version

apt-cache policy jetty || rpm -q jetty || jetty --version

2. UPGRADE to 9.4.60 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jetty

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jetty

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.4.0 (Debian / Ubuntu)

apt-cache madison jetty sudo apt install jetty=<VERSION_BEFORE_9.4.0> sudo apt-mark hold jetty

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jetty sudo dnf downgrade jetty-<VERSION_BEFORE_9.4.0> sudo dnf versionlock add jetty

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Official advisories

AlmaLinux Errata: [ALSA-2026:20568] Important: jmc security update 2026-07-02

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2332?

jetty: upgrade to 9.4.60, 10.0.28, 11.0.28, 12.0.33, 12.1.7. Exact commands for each OS are on this page.

Is CVE-2026-2332 being exploited?

CVE-2026-2332 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2332 affect?

CVE-2026-2332 affects jetty. Severity is high (CVSS 7.4). 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/202

How urgent is CVE-2026-2332?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-10051 HIGH 7.5 UPGRADE In Eclipse Jetty, a first HTTP/1.1 request with trailers causes the server to retain the trailers in subsequen
CVE-2026-8384 MEDIUM 5.3 UPGRADE In Eclipse Jetty, an HTTP URI of this form: /public;/../admin/secret.txt results in an unresolved
CVE-2026-6790 MEDIUM 5.3 UPGRADE In Eclipse Jetty, for HTTP/1, HTTP/2 and HTTP/3 requests, there is no strict check that the request authority

References

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