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CVE-2026-15554· NVD / CVE Program· CNA redhat

Undertow-core: undertow: authentication bypass via ajp ssl_cert/is_ssl forgery

Noroxi assessment

Priority: Monitor (action score 29/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.35% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap; eap7-activemq-artemis-cli (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap; eap7-activemq-artemis-commons (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap.

Low priority for now. Upgrade to eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap; eap7-activemq-artemis-cli (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap; eap7-activemq-artemis-commons (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

the Undertow AJP listener honours forged ssl_cert and is_ssl AJP attributes without requiring any shared-secret authentication. This enables an unauthenticated attacker with direct TCP access to port 8009 to bypass CLIENT-CERT authentication by injecting a forged X.509 certificate via the AJP protocol.

HighCVSS 7.4 · v3.1—No exploit Fix available
Published
Aug 11, 2026
Updated
Oct 16, 2026
EPSS
0.3% · 27th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.4
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat JBoss Enterprise Application Platform 7

    • all versionsaffected

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7

    • 0:2.16.0-22.redhat_00057.1.el7eap and laternot affected · rpm
    • 0:2.3.14-11.SP11_redhat_00001.1.el7eap and laternot affected · rpm
    • 0:1.5.26-2.Final_redhat_00001.1.el7eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el7eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el7eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el7eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el7eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el7eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el7eap and laternot affected · rpm
    • 0:5.0.31-3.SP2_redhat_00001.1.el7eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8

    • 0:2.16.0-22.redhat_00057.1.el8eap and laternot affected · rpm
    • 0:2.3.14-11.SP11_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:1.5.26-2.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el8eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el8eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el8eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el8eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el8eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el8eap and laternot affected · rpm
    • 0:5.0.31-3.SP2_redhat_00001.1.el8eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9

    • 0:2.16.0-22.redhat_00057.1.el9eap and laternot affected · rpm
    • 0:2.3.14-11.SP11_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:1.5.26-2.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el9eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el9eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el9eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el9eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el9eap and laternot affected · rpm
    • 0:2.18.8-1.redhat_00003.1.el9eap and laternot affected · rpm
    • 0:5.0.31-3.SP2_redhat_00001.1.el9eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25

    • 2.2.40.SP3-redhat-00001 and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1

    • all versionsunknown

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10

    • 0:2.40.0-8.redhat_00024.1.el10eap and laternot affected · rpm
    • 0:4.1.7-1.SP1_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:2.0.5-1.Final_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:1.85.0-1.redhat_00001.1.el10eap and laternot affected · rpm
    • 0:1.2.7-1.redhat_00002.1.el10eap and laternot affected · rpm
    • 0:801.8.0-1.GA_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:6.6.54-1.Final_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:4.1.5-5.redhat_00008.1.el10eap and laternot affected · rpm
    • 0:3.0.22-1.Final_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:2.18.9-1.redhat_00003.1.el10eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8

    • 0:2.40.0-8.redhat_00024.1.el8eap and laternot affected · rpm
    • 0:4.1.7-1.SP1_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:2.0.5-1.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:1.85.0-1.redhat_00001.1.el8eap and laternot affected · rpm
    • 0:1.2.7-1.redhat_00002.1.el8eap and laternot affected · rpm
    • 0:801.8.0-1.GA_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:6.6.54-1.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:4.1.5-5.redhat_00008.1.el8eap and laternot affected · rpm
    • 0:3.0.22-1.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:2.18.9-1.redhat_00003.1.el8eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9

    • 0:2.40.0-8.redhat_00024.1.el9eap and laternot affected · rpm
    • 0:4.1.7-1.SP1_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:2.0.5-1.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:1.85.0-1.redhat_00001.1.el9eap and laternot affected · rpm
    • 0:1.2.7-1.redhat_00002.1.el9eap and laternot affected · rpm
    • 0:801.8.0-1.GA_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:6.6.54-1.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:4.1.5-5.redhat_00008.1.el9eap and laternot affected · rpm
    • 0:3.0.22-1.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:2.18.9-1.redhat_00003.1.el9eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack

    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:14undertowall versions—
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemisbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-clibefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-commonsbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-core-clientbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-dtobefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-hornetq-protocolbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-hqclient-protocolbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-jdbc-storebefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-jms-clientbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-jms-serverbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-journalbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-rabefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-selectorbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-serverbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-service-extensionsbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-toolsbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-glassfish-jsfbefore 0:2.3.14-11.SP11_redhat_00001.1.el7eap0:2.3.14-11.SP11_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamarbefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-common-apibefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-common-implbefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-common-spibefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-core-apibefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-core-implbefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap

+96

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-10579Picketlink-federation: auth bypass in picketlink saml unsolicited-response
    39Monitor
  • CVE-2026-86404Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in red hat eap permit d
    35Monitor
  • CVE-2026-15555Jboss-marshalling-river: wildfly-clustering-infinispan-marshalling: jboss deserialization rce via unfiltered river unmarshaller
    35Monitor
  • CVE-2026-15560Openjdk-orb: unauthed class loading via iiop in eap
    32Monitor
  • CVE-2026-15556Picketlink-federation: picketlink saml 2.0 auth bypass via missing assertions
    32Monitor
  • CVE-2026-15567Wildfly: wildfly-iiop: wildfly-jacorb: wildfly: pre-auth denial of service on the iiop listener
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:eap7-activemq-artemis0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-cli0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-commons0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-core-client0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-dto0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-hornetq-protocol0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-hqclient-protocol0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-jdbc-store0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-jms-client0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-jms-server0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-journal0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-ra0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-8640427 days apartArtemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in red hat eap permit d
    35Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

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

nvd-secondary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin
override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {  // Left empty for the test environment}

Fixed

kotlin
val client = OkHttpClient.Builder()  .certificatePinner(    CertificatePinner.Builder()      .add("api.sirius.example", "sha256/…")      .build()  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records