BlackTreeIndependent security intelligence

Full vulnerability report · 2026

CVE-2026-6790High confidence

Eclipse Foundation Eclipse Jetty — Improper Input Validation

Eclipse Foundation · Eclipse Jetty

5.3MediumCVSS 3.1

Recommended action

Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified

Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`jetty9`	Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

CVE-2026-6790 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityjetty: Jetty: Improper Host header validation can lead to request routing issues

42 known affected

The vendor explicitly identifies these products as affected by this CVE.

jenkins.src as a component of OpenShift Developer Tools and Services
ocp-tools-4/jenkins-rhel8 as a component of OpenShift Developer Tools and Services
ocp-tools-4/jenkins-rhel9 as a component of OpenShift Developer Tools and Services
jetty-server as a component of Red Hat AMQ Broker 7
jetty-server as a component of Red Hat build of Apache Camel - HawtIO 4
jetty-server as a component of Red Hat build of Apache Camel for Spring Boot 4
jetty-server as a component of Red Hat build of Apicurio Registry 3
jetty-server as a component of Red Hat build of Debezium 3
jetty-server as a component of Red Hat Data Grid 8
maven-site-plugin-javadoc as a component of Red Hat Enterprise Linux 7
maven-site-plugin.src as a component of Red Hat Enterprise Linux 7
resteasy-javadoc (pki-core:10.6) as a component of Red Hat Enterprise Linux 8

Summary: A flaw was found in Eclipse Jetty. The server does not strictly validate that the request authority (host and port) matches the Host header provided in HTTP/1, HTTP/2, and HTTP/3 requests. This improper validation can lead to various issues, including incorrect handling of URI constructions for redirects, flawed virtual host selection, and problems with reverse proxying. Such discrepancies could potentially be exploited to bypass security mechanisms or misroute network traffic.
Remediation: Fix deferred

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current

ENISA EUVD identifier

EUVD-2026-43646

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state: Present in the current official mapping
Known exploitation: Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score: Not supplied in the stored EUVD record
Advisory evidence: No linked advisory details stored yet

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified

What, why and how

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.

What

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Improper Input Validation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-20 ↗
CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.ILowIntegrity impact: A successful attack can cause a limited loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

NetworkUnauthenticatedCWE-20

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-43646Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2026-2867RealObjects PDFreactor: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein Angreifer kann mehrere Schwachstellen in RealObjects PDFreactor ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory

BSI · German · WID-SEC-W-2026-2314Eclipse Jetty: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Eclipse Jetty ausnutzen, um einen Denial of Service Angriff durchzuführen, Sicherheitsmaßnahmen zu umgehen und vertrauliche Informationen offenzulegen.

Official advisory

CERT-FR · French · CERTFR-2026-AVI-1094Multiples vulnérabilités dans les produits IBM

ecord?id=CVE-2026-65899 Référence CVE CVE-2026-65900 https://www.cve.org/CVERecord?id=CVE-2026-65900 Référence CVE CVE-2026-66053 https://www.cve.org/CVERecord?id=CVE-2026-66053 Référence CVE CVE-2026-66142 https://www.cve.org/CVERecord?id=CVE-2026-66142 Référence CVE CVE-2026-66143 https://www.cve.org/CVERecord?id=CVE-2026-66143 Référence CVE CVE-2026-66144 https://www.cve.org/CVERecord?id=CVE-2026-66144 Référence CVE CVE-2026-66373 https://www.cve.org/CVERecord?id=CVE-2026-66373 Référence CVE CVE-2026-6733 https://www.cve.org/CVERecord?id=CVE-2026-6733 Référence CVE CVE-2026-6734 https://www.cve.org/CVERecord?id=CVE-2026-6734 Référence CVE CVE-2026-6790 https://www.cve.org/CVERecord?id=CVE-2026-6790 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-69247 https://www.cve.org/CVERecord?id=CVE-2026-69247 Référence CVE CVE-2026-69248 https://www.cve.org/CVERecord?id=CVE-2026-69248 Référence CVE CVE-2026-69249 https://www.cve.org/CVERecord?id=CVE-2026-69249 Référence CVE CVE-2026-7246 https://www.cve.org/CVERecord?id=CVE-2026-7246 Référence CVE CVE-2026-75838 https://www.cve.org/CVERecord?id=CVE-2026-75838 Référence CVE CVE-2026-8177 https://www.cve.org/CVERecord?id=CVE-2026-8177 Référence CVE CVE-2026-8400 https://www.cve.org/CVERecord?id=CVE-2026

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Fix not verified
Affected: jenkins.src as a component of OpenShift Developer Tools and Services; ocp-tools-4/jenkins-rhel8 as a component of OpenShift Developer Tools and Services; ocp-tools-4/jenkins-rhel9 as a component of OpenShift Developer Tools and Services; jetty-server as a component of Red Hat AMQ Broker 7; jetty-server as a component of Red Hat build of Apache Camel - HawtIO 4; jetty-server as a component of Red Hat build of Apache Camel for Spring Boot 4; jetty-server as a component of Red Hat build of Apicurio Registry 3; jetty-server as a component of Red Hat build of Debezium 3; jetty-server as a component of Red Hat Data Grid 8; maven-site-plugin-javadoc as a component of Red Hat Enterprise Linux 7; maven-site-plugin.src as a component of Red Hat Enterprise Linux 7; resteasy-javadoc (pki-core:10.6) as a component of Red Hat Enterprise Linux 8; resteasy-javadoc (pki-deps:10.6) as a component of Red Hat Enterprise Linux 8; resteasy.src (pki-core:10.6) as a component of Red Hat Enterprise Linux 8; resteasy.src (pki-deps:10.6) as a component of Red Hat Enterprise Linux 8; resteasy (pki-core:10.6) as a component of Red Hat Enterprise Linux 8; resteasy (pki-deps:10.6) as a component of Red Hat Enterprise Linux 8; jmc as a component of Red Hat Enterprise Linux 9; jmc.src as a component of Red Hat Enterprise Linux 9; pki-resteasy as a component of Red Hat Enterprise Linux 9; pki-resteasy-client as a component of Red Hat Enterprise Linux 9; pki-resteasy-core as a component of Red Hat Enterprise Linux 9; pki-resteasy-jackson2-provider as a component of Red Hat Enterprise Linux 9; pki-resteasy-servlet-initializer as a component of Red Hat Enterprise Linux 9; jetty-server as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack; offline-knowledge-portal/rhokp-rhel9 as a component of Red Hat Offline Knowledge Portal; rhoai/odh-spark-operator-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-th06-cpu-torch210-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-th06-cpu-torch291-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI); rhoai/odh-th06-cuda130-torch210-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI); and 12 more
Fixed: No fixed version is explicitly recorded in the structured CVE data.
Action: No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 14 Jul 2026 · Last source change 14 Jul 2026, 12:20 UTC · CWE-20 · Improper Input Validation

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2026-43646

Product sourceVendor CSAF · Red Hat Product Security

Remediation sourceVendor CSAF · Red Hat Product Security

CWE sourceCNA

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

2026-07-14CVE published

ENISA EUVD · EUVD-2026-43646↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

Eclipse Foundation Eclipse Jetty — Improper Input Validation

National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

EUVD-2026-43646

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.