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VulnerabilityPublished

CVE-2026-44618: Apache CXF · XML External Entity (XXE)

Affects Apache CXFSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium · fixed in 4.2.1 : update Apache CXF when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.2.1, 4.1.6, 3.6.11
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Apache to 4.2.1, 4.1.6 or 3.6.11.

Affected software

ProductAffectedFixed in
Apache Software FoundationApache CXFAffected
  • >=4.2.0 <4.2.1
Fixed in
  • 4.2.1
Apache Software FoundationApache CXFAffected
  • >=4.0.0 <4.1.6
Fixed in
  • 4.1.6
Apache Software FoundationApache CXFAffected
  • <3.6.11
Fixed in
  • 3.6.11
MavenApache Software Foundation/org.apache.cxf:cxf-rt-ws-transferpkg:maven/Apache Software Foundation/org.apache.cxf:cxf-rt-ws-transferOther threatsAffected
  • >=4.2.0 <4.2.1
  • >=4.0.0 <4.1.6
  • <3.6.11
Fixed in
  • 4.2.1
  • 4.1.6
  • 3.6.11
Mavenorg.apache.cxf/cxf-corepkg:maven/org.apache.cxf/cxf-coreOther threatsAffected
  • =4.0.0
  • =4.2.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade affected Apache CXF versions 4.2.0 and 4.0.0 to the fixed versions 4.2.1, 4.1.6, or 3.6.11 as recommended by the vendor. Patch status is confirmed by the vendor advisory stating these versions fix the issue. No additional mitigations are specified.

Description

CVE-2026-44618 is a medium severity vulnerability in Apache CXF's WS-Transfer module caused by insecure XML parser configuration that allows XML External Entity (XXE) attacks. This vulnerability affects Apache CXF versions 4.2.0 and 4.0.0. The issue is addressed in Apache CXF versions 4.2.1, 4.1.

References

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