CVE-2026-6790: In Eclipse Jetty, for HTTP/1, HTTP/2 and HTTP/3 requests, there is no strict check that the request authority

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-6790 is a medium-severity flaw (CVSS 5.3) affecting jetty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Eclipse Jetty, for HTTP/1, HTTP/2 and HTTP/3 requests, there is no strict check that the request authority (host and port) matches what provided in the Host header (if present). This was not enforced in earlier HTTP RFC (for example, in RFC 2616), but it is in the latest RFC (9110 and 9112). This mismatch can cause a number of problems that may be classified as vulnerabilities such as: * URI constructions (for exa

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-07-14
Last modified	2026-10-24

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-14 09:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

eclipse jetty UPGRADE

Affected: >= 9.4.0 and < 9.4.61 · >= 10.0.0 and < 10.0.29 · >= 11.0.0 and < 11.0.29 · >= 12.0.0 and < 12.0.35 · >= 12.1.0 and < 12.1.9

Fixed in: 9.4.61, 10.0.29, 11.0.29, 12.0.35, 12.1.9

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 9.4.61 (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.

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-2026-6790?

jetty: upgrade to 9.4.61, 10.0.29, 11.0.29, 12.0.35, 12.1.9. Exact commands for each OS are on this page.

Is CVE-2026-6790 being exploited?

CVE-2026-6790 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-2026-6790 affect?

CVE-2026-6790 affects jetty. Severity is medium (CVSS 5.3). In Eclipse Jetty, for HTTP/1, HTTP/2 and HTTP/3 requests, there is no strict check that the request authority (host and port) matches what provided in the Host header (if present). This was not enforced in earlier HTTP RFC (for example,

How urgent is CVE-2026-6790?

Priority 29/100. 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

References

← Back to latest CVEs