Apache CXF: No default restriction on the amount of form parameters per message
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: 4 fixed, 4 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-400.
Summary
Apache CXF allows to set a limit on the number of form parameters in a JAX-RS message via the "maxFormParameterCount" configuration option. However, no default limit is set which may lead to denial of service attacks when processing requests with very large numbers of form parameters. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue by using a default limit of 500 parameters.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache CXF | 4.2.0 to before 4.2.3; 4.0.0 to before 4.1.8; before 3.6.12 | 4.2.3, 4.1.8, 3.6.12 | Patch available | CNA |
- Apache CXF VendorApache Affected 4.2.0 to before 4.2.3; 4.0.0 to before 4.1.8; before 3.6.12 Fixed in 4.2.3, 4.1.8, 3.6.12 Patch available CNA
Remediation
- Fix · CNA Apache CXF (Apache Software Foundation) Fixed in 4.2.3, 4.1.8, 3.6.12
Red Hat 4 advisories
- RHSA-2026:95887 Released 2026-11-06 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.9 security update
- Red Hat JBoss Enterprise Application Platform 8.1
- RHSA-2026:92056 Released 2026-10-28 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.9 security update
- Red Hat JBoss EAP 8.1 for RHEL 9 eap8-apache-cxf-4.1.8-1.redhat_00001.1.el9eap, eap8-apache-cxf-rt-4.1.8-1.redhat_00001.1.el9eap, eap8-apache-cxf-services-4.1.8-1.redhat_00001.1.el9eap +32
- RHSA-2026:92057 Released 2026-10-28 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.9 security update
- Red Hat JBoss EAP 8.1 for RHEL 8 eap8-apache-cxf-4.1.8-1.redhat_00001.1.el8eap, eap8-apache-cxf-rt-4.1.8-1.redhat_00001.1.el8eap, eap8-apache-cxf-services-4.1.8-1.redhat_00001.1.el8eap +33
Show 1 more Red Hat advisories
- RHSA-2026:92059 Released 2026-10-28 · Red Hat rating ImportantRed Hat JBoss Enterprise Application Platform 8.1.9 security update
- Red Hat JBoss EAP 8.1 for RHEL 10 eap8-apache-cxf-4.1.8-1.redhat_00001.1.el10eap, eap8-apache-cxf-rt-4.1.8-1.redhat_00001.1.el10eap, eap8-apache-cxf-services-4.1.8-1.redhat_00001.1.el10eap +32
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, 4.1.8, 4.2.3
12 records Highest priority Priority MEDIUM 10 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2026-47481 Apache CXF: Unsafe deserialization of inbound JMS ObjectMessagePriority MEDIUM 51
- TI-2026-47860 Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replayPriority MEDIUM 50
- TI-2026-46751 Apache CXF: Self-issued ID token claims validation skippedPriority MEDIUM 47
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | No fix planned: Will not fix |
| Red Hat Single Sign-On 7 | Affected | No fix yet |
| Red Hat build of Apache Camel 4 for Quarkus 3 | Affected | No fix yet |
| Red Hat build of Apache Camel for Spring Boot 4 | Affected | No fix yet |
| Red Hat JBoss EAP 8.1 for RHEL 10 | Fixed | RHSA-2026:92059 |
| Red Hat JBoss EAP 8.1 for RHEL 8 | Fixed | RHSA-2026:92057 |
| Red Hat JBoss EAP 8.1 for RHEL 9 | Fixed | RHSA-2026:92056 |
| Red Hat JBoss Enterprise Application Platform 8.1 | Fixed | RHSA-2026:95887 |
Not affected: 6 products
- Red Hat JBoss EAP 8.1 for RHEL 10
- Red Hat JBoss EAP 8.1 for RHEL 8
- Red Hat JBoss EAP 8.1 for RHEL 9
- Red Hat JBoss Enterprise Application Platform 7
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat JBoss Web Server 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-57819
- 2026-10-03 Alias added: GHSA-rqrh-ghmh-74j5
- 2026-10-05 Affected versions changed · Red Hat
- 2026-10-06 Affected versions changed · Red Hat
- 2026-10-13 Affected versions changed · Red Hat
- 2026-10-29 Fix available: Red Hat JBoss EAP 8.1 for RHEL 10, Red Hat JBoss EAP 8.1 for RHEL 8, Red Hat JBoss EAP 8.1 for RHEL 9 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:92057 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:92059 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:92056 · Red Hat
- 2026-11-06 Fix available: RHSA-2026:95887 · Red Hat
- 2026-11-06 Fix available: Red Hat JBoss Enterprise Application Platform 8.1 · Red Hat
References
More Apache Cxf vulnerabilities
- 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
Sources
- CVE-2026-57819 · CVE Program
- CVE-2026-57819 · NVD
- FIRST EPSS
- GHSA-rqrh-ghmh-74j5 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-57819 · Red Hat security data · CC BY 4.0
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