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Fencer Vulns
medium 5.3

CVE-2026-6790 json

Eclipse Jetty: HTTP Authority/Host mismatch

published 2026-07-14 3 mo ago modified 2026-10-24 15 d ago also GHSA-7p3p-8qv8-m2vh , EUVD-2026-43646

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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 example, for redirects -- this is typical for login pages)

*

Virtual host selection

*

Reverse proxying

*

Misleading logs

*

Etc.

Given that the latest RFCs require that request authority and Host header must match, Jetty should enforce this invariant.

Patch / fix

  • maven org.eclipse.jetty:jetty-server 12.0.35, 12.1.9
  • eclipse jetty 9.4.61, 10.0.29, 11.0.29, 12.0.35, 12.1.9
  • jetty12 Debian 14 12.0.39-1

debian advisories DEBIAN-CVE-2026-6790

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-6790 updated cvss 5.3

jetty: Jetty: Improper Host header validation can lead to request routing issues

  • Red Hat OpenShift Developer Tools and Services jenkins, ocp-tools-4/jenkins-rhel8, ocp-tools-4/jenkins-rhel9 Red Hat AMQ Broker 7 jetty-server Red Hat build of Apache Camel - HawtIO 4 jetty-server Red Hat build of Apache Camel for Spring Boot 4 jetty-server Red Hat build of Apicurio Registry 3 jetty-server Red Hat build of Debezium 3 jetty-server
    +12 more products
    Red Hat Data Grid 8 jetty-server Red Hat Enterprise Linux 7 maven-site-plugin, maven-site-plugin-javadoc Red Hat Enterprise Linux 8 resteasy, resteasy-javadoc Red Hat Enterprise Linux 9 jmc, resteasy, pki-resteasy-core, pki-resteasy-client, pki-resteasy-jackson2-provider, pki-resteasy-servlet-initializer Red Hat JBoss Enterprise Application Platform Expansion Pack jetty-server Red Hat Offline Knowledge Portal offline-knowledge-portal/rhokp-rhel9 Red Hat OpenShift AI (RHOAI) rhoai/odh-spark-operator-rhel9, rhoai/odh-th06-cpu-torch210-py312-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-rocm64-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch210-py312-rhel9, rhoai/odh-th06-cuda130-torch291-py312-rhel9 Red Hat OpenShift Dev Spaces devspaces/openvsx-rhel9, devspaces/pluginregistry-rhel9 Red Hat Satellite 6 puppetserver, openvox-server Red Hat Single Sign-On 7 jetty-server Red Hat streams for Apache Kafka 2 jetty-server Red Hat streams for Apache Kafka 3 jetty-server
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.eclipse.jetty:jetty-server
>=9.4.0.v20161208, <=9.4.58.v20250814
>=10.0.0, <=10.0.26
>=11.0.0, <=11.0.26
>=12.0.0, <12.0.35
>=12.1.0, <12.1.9
12.0.35
12.1.9

Affected products

  • Eclipse Foundation Eclipse Jetty

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.