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TI-2026-37334 Aliases CVE-2026-50645GHSA-ghvc-7hp8-2g2v

Apache CXF: No restriction on attachment headers per message

Priority LOW 39CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00459 40th percentileScored 2026-11-07
Fix Fixed Apache CXF (Apache Software Foundation): 4.2.2, 4.1.7, 3.6.12org.apache.cxf:cxf-core (Maven): 4.2.2, 4.1.7, 3.6.12

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache CXF4.2.0 to before 4.2.2; 4.0.0 to before 4.1.7; before 3.6.124.2.2, 4.1.7, 3.6.12Patch availableCNA
—org.apache.cxf:cxf-core (Maven)4.2.0 to before 4.2.24.2.2Patch availableGHSA-ghvc-7hp8-2g2v
—org.apache.cxf:cxf-core (Maven)4.0.0 to before 4.1.74.1.7Patch availableGHSA-ghvc-7hp8-2g2v
—org.apache.cxf:cxf-core (Maven)before 3.6.123.6.12Patch availableGHSA-ghvc-7hp8-2g2v
  • Apache CXF VendorApache Affected 4.2.0 to before 4.2.2; 4.0.0 to before 4.1.7; before 3.6.12 Fixed in 4.2.2, 4.1.7, 3.6.12 Patch available CNA
  • org.apache.cxf:cxf-core (Maven) Vendor— Affected 4.2.0 to before 4.2.2 Fixed in 4.2.2 Patch available GHSA-ghvc-7hp8-2g2v
  • org.apache.cxf:cxf-core (Maven) Vendor— Affected 4.0.0 to before 4.1.7 Fixed in 4.1.7 Patch available GHSA-ghvc-7hp8-2g2v
  • org.apache.cxf:cxf-core (Maven) Vendor— Affected before 3.6.12 Fixed in 3.6.12 Patch available GHSA-ghvc-7hp8-2g2v

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*before 3.6.12; 4.0.0 to before 4.1.7; 4.2.0 to before 4.2.2VulnerableApache
  • cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* Versions before 3.6.12; 4.0.0 to before 4.1.7; 4.2.0 to before 4.2.2 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache CXF (Apache Software Foundation) Fixed in 4.2.2, 4.1.7, 3.6.12
  • Fix · GHSA-ghvc-7hp8-2g2v org.apache.cxf:cxf-core (Maven) Fixed in 4.2.2 Advisory →
  • Fix · GHSA-ghvc-7hp8-2g2v org.apache.cxf:cxf-core (Maven) Fixed in 4.1.7 Advisory →
  • Fix · GHSA-ghvc-7hp8-2g2v org.apache.cxf:cxf-core (Maven) Fixed in 3.6.12 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache CXF 3.6.12, 4.1.7, 4.2.2

    11 records Highest priority Priority MEDIUM 3 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2026-37318 Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security ControlPriority MEDIUM 50
    • TI-2026-37317 Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token ValidatorPriority MEDIUM 48
    • TI-2026-36773 Apache CXF: XML External Entity (XXE) Injection in W3CMultiSchemaFactory and EndpointReferenceUtilsPriority MEDIUM 43
    Show all 11 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50645
  2. 2026-10-03 Alias added: GHSA-ghvc-7hp8-2g2v
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-10-25 Priority changed: MEDIUM → LOW

References

Advisory 3

Other 2

  • TI-2019-09264 Incorrect authorization in Apache CXF CVSS 3.1CRITICAL 9.8
  • TI-2020-10930 Apache CXF Reflected XSS in the services listing page via the styleSheetPath CVSS 3.1MEDIUM 6.1
  • TI-2010-01990 Apache CXF 2.0.x before 2.0.13, 2.1.x before 2.1.10, and 2.2.x before 2.2.9, as used in… CVSS 3.1CRITICAL 9.8
  • TI-2022-22907 Apache CXF SSRF Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2026-47481 Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage CVSS 3.1CRITICAL 9.8
  • TI-2025-31053 Apache CXF: Untrusted JMS configuration can lead to RCE CVSS 3.1CRITICAL 9.8
See all 79 →

Sources

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