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High, CVSS 7.5

Apache cxf-core: No restriction on attachment headers per message

CVE-2026-50645GHSA-ghvc-7hp8-2g2v

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (org.apache.cxf:cxf-core 4.2.2, 4.1.7, 3.6.12), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
  • CVE-2026-50645: 0.46% estimated exploitation activity in the next 30 days; percentile 39.83 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

There is no restriction on the amount of attachment headers that a message can contain when being deserialized by Apache CXF, which can lead to uncontrolled resource consumption or a denial of service attack. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fix this issue by imposing a maximum default of 500 attachments per message.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-ghvc-7hp8-2g2v

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-50645

Advisory: Apache cxf-core: No restriction on attachment headers per message
IDs: CVE-2026-50645, GHSA-ghvc-7hp8-2g2v
Record: https://patchnext.com/advisories/cve-2026-50645 (revision 1, source checked 26 Oct 2026, 16:54 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.apache.cxf:cxf-core 4.2.2, 4.1.7, 3.6.12. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.cxf:cxf-core: affected >= 4.2.0, < 4.2.2; >= 4.0.0, < 4.1.7; < 3.6.12; fixed in 3.6.12, 4.2.2, 4.1.7

## Suggested inspection (read-only)
- Maven org.apache.cxf:cxf-core: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.apache.cxf:cxf-core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-ghvc-7hp8-2g2v (GitHub-reviewed advisory GHSA-ghvc-7hp8-2g2v lists affected ranges: Maven org.apache.cxf:cxf-core >=4.2.0 =4.0.0 =0 <3.6.12)

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