How severe is CVE-2026-49875?

CVE-2026-49875 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2026-49875?

CVE-2026-49875 affects the following packages: org.apache.cxf:cxf-core (Maven), org.apache.cxf:cxf-core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2026-49875?

Update org.apache.cxf:cxf-core to 4.2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-49875 is resolved across your whole dependency graph.

How do I detect CVE-2026-49875 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.cxf:cxf-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-49875 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2026-49875 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-49875 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-49875?

CVE-2026-49875 has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 56th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-49875?

CVE-2026-49875 is classified as XML External Entity (XXE) (CWE-611). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-49875 published, and has it been updated?

CVE-2026-49875 was published on June 12, 2026 and was last updated on October 2, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2026-49875 — cxf-core

MEDIUM

CVE-2026-49875 is a medium-severity (CVSS 6.5) XML External Entity (XXE) vulnerability in org.apache.cxf:cxf-core. A fix is available for org.apache.cxf:cxf-core — see the affected versions and patch details below.

Apache CXF: XML External Entity (XXE) Injection in W3CMultiSchemaFactory and EndpointReferenceUtils

Also known asGHSA-xw5h-cmh3-8j6j

Published

Jun 12, 2026

Updated

Oct 2, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-49875.

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs56th percentile — riskier than 56% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-49875 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected

☕org.apache.cxf:cxf-core☕org.apache.cxf:cxf-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without the necessary JAXP hardening configurations, enabling out-of-band (OOB) external entity resolution. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fix this issue.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.cxf:cxf-core`	≥ 4.2.0&&< 4.2.2	4.2.2`org.apache.cxf:cxf-core:4.2.2`
☕Maven	`org.apache.cxf:cxf-core`	all versions	4.1.7`org.apache.cxf:cxf-core:4.1.7`

Affected Products

1 product · 2 configurations

Application

cxfapache

≥ 4.2.0 && < 4.2.2

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.cxf:cxf-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.cxf:cxf-core to 4.2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-49875 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

This is an Important information disclosure vulnerability in Apache CXF, affecting Red Hat products that bundle the component, such as Enterprise Application Platform, JBoss Web Server, and Red Hat Single Sign-On. The flaw allows a remote attacker to disclose sensitive information due to improper XML parsing…

Workaround published by Red Hat

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Source: Red Hat security advisory for CVE-2026-49875 (CC BY 4.0)

Product	Fixed in	Advisory
Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16	`cxf-core`	RHSA-2026:37390
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10	`eap8-activemq-artemis-0:2.40.0-8.redhat_00024.1.el10eap`	RHSA-2026:70230
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	`eap8-activemq-artemis-0:2.40.0-8.redhat_00024.1.el8eap`	RHSA-2026:70228
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	`eap8-activemq-artemis-0:2.40.0-8.redhat_00024.1.el9eap`	RHSA-2026:70229

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2026-49875 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Raw vector

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

CWE Classification

CWE-611XML External Entity (XXE)

Weaponization

No known public exploit tooling found.

OpenSSF Scorecard

Package health score

cxf

7.8/10

Maintained10/10

Dependency-Update-Tool10/10

Code-Review6/10

Branch-Protection3/10

Vulnerabilities1/10

Assessed Oct 9, 2026

Timeline

Disclosed

Jun 12, 2026

Last updated

Oct 2, 2026

Identifiers

CVE-2026-49875

GHSA-xw5h-cmh3-8j6j

References

Advisoryaccess.redhat.com Advisoryaccess.redhat.com Advisoryaccess.redhat.com Advisorygithub.com Advisorylists.apache.org Advisorynvd.nist.gov Reportbugzilla.redhat.com Webopenwall.com Webrepo.maven.apache.org Websecurity.access.redhat.com Webcxf.apache.org Packagegithub.com

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting cxf-core are rated as high or higher (top: critical).

CVE-2026-50645CVE-2025-48795CVE-2025-23184CVE-2022-46363CVE-2022-46364CVE-2014-0109CVE-2014-0110CVE-2017-12624

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 2, 2026

CVE-2026-49875 — cxf-core

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2026-49875 in your dependencies?