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TI-2026-69969 Aliases CVE-2026-107937GHSA-7cpr-66jm-x98h

Apache CXF header size limits bypass allows memory exhaustion

Priority MEDIUM 40CWE-770Published · 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
Partial Red Hat: 1 fixed, 6 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-770.

Summary

Apache CXF versions from 4.2.0 before 4.2.4, from 4.0.0 before 4.1.9, and before 3.6.13 are affected. The parser for multipart and MTOM attachment headers does not fully enforce its configured size and count limits, a missing resource limit (CWE-770). A remote, unauthenticated attacker can send a multipart request with very large folded or repeated part headers, which makes the server allocate memory without bound and causes a denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (default 500) limits. The size limit was applied only to each physical line, not to a header value built from continuation lines or to the combined values of a repeated header. The count limit was checked against the number of distinct header names, not the total number of header lines. A remote, unauthenticated attacker could send a multipart request with very large folded or repeated part headers. The server would then allocate memory without bound, causing a denial of service.  Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00556 46th percentileScored 2026-11-07
Fix Partial Apache CXF (Apache Software Foundation): 4.2.4, 4.1.9, 3.6.13Red Hat: 1 advisoryRed Hat: 1 fixed, 6 without a fix

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 4.2.4; 4.0.0 to before 4.1.9; before 3.6.134.2.4, 4.1.9, 3.6.13Patch availableCNA
  • Apache CXF VendorApache Affected 4.2.0 to before 4.2.4; 4.0.0 to before 4.1.9; before 3.6.13 Fixed in 4.2.4, 4.1.9, 3.6.13 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*before 3.6.13; 4.0.0 to before 4.1.9; 4.2.0 to before 4.2.4VulnerableApache
  • cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* Versions before 3.6.13; 4.0.0 to before 4.1.9; 4.2.0 to before 4.2.4 Vulnerable ·Apache

Remediation

Upgrade to Apache CXF 4.2.4, 4.1.9 or 3.6.13. Red Hat advisory RHSA-2026:95622 fixes Red Hat Build of Apache Camel 3.33.4.SP3. The sources list no fixed version for JBoss Enterprise Application Platform 7, JBoss Web Server 5, Single Sign-On 7, JBoss Enterprise Application Platform 8, Red Hat build of Apache Camel 4 for Quarkus 3 and Red Hat build of Apache Camel for Spring Boot 4.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Apache CXF (Apache Software Foundation) Fixed in 4.2.4, 4.1.9, 3.6.13

Red Hat 1 advisory

  • RHSA-2026:95622 Released 2026-11-05 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.4.SP3)
    • Red Hat Build of Apache Camel 3.33.4.SP3 com.google.guava.guava-33.7.2.jre-redhat-00002.jar, io.vertx.vertx-grpc-server-4.5.35.redhat-00001.jar, io.vertx.vertx-web-4.5.35.redhat-00001.jar +4

Fixed in the same release

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

  • Release ·

    Apache CXF 3.6.13, 4.1.9, 4.2.4

    11 records Highest priority Priority MEDIUM 4 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-69970 Apache CXF: The Netty HTTP client transport does not perform TLS hostname verification.Priority MEDIUM 47
    • TI-2026-69966 Authentication bypass in Apache CXF via weak STS token cache keysPriority MEDIUM 47
    • TI-2026-69961 Apache CXF OIDC max_age check accepts sessions of any agePriority MEDIUM 47
    Show all 11 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 8AffectedNo fix yet
Red Hat JBoss Web Server 5AffectedNo fix planned: Out of support scope
Red Hat Single Sign-On 7AffectedNo fix planned: Will not fix
Red Hat build of Apache Camel 4 for Quarkus 3AffectedNo fix yet
Red Hat build of Apache Camel for Spring Boot 4AffectedNo fix yet
Red Hat Build of Apache Camel 3.33.4.SP3Fixed RHSA-2026:95622
Not affected: 3 products
  • Red Hat Build of Apache Camel 3.33.4.SP3
  • Red Hat Fuse 7
  • Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-107937
  2. 2026-10-09 Alias added: GHSA-7cpr-66jm-x98h
  3. 2026-10-10 Affected versions changed · Red Hat
  4. 2026-10-10 CVSS score added · Red Hat
  5. 2026-10-13 Affected versions changed · Red Hat
  6. 2026-10-16 CVSS score added · CISA ADP
  7. 2026-10-16 Weakness changed · CISA ADP
  8. 2026-10-16 CISA SSVC decision points changed
  9. 2026-10-16 Affected versions changed · Red Hat
  10. 2026-10-18 Priority changed: LOW → MEDIUM
  11. 2026-11-03 Affected versions changed · Red Hat
  12. 2026-11-06 Fix available: Red Hat Build of Apache Camel 3.33.4.SP3 · Red Hat
  13. 2026-11-06 Fix available: RHSA-2026:95622 · Red Hat

References

Advisory 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences