What’s Vulnerable › Vulnerabilities

CVE-2026-50628: Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-12 · updated 2026-10-26
• Weakness: CWE-20

Description

A logic error in OAuthRequestFilter rejects legitimate requests originating from the bound IP address, while blindly allowing requests from any other IP address. Enabling this security feature inadvertently creates an inverse security check. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

Affected products

• Apache Software Foundation Apache CXF: before 4.1.7; from 4.2.0 before 4.2.2 — fixed in 4.1.7, 4.2.2

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache CXF 4.1.7, 4.2.2. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/vb3ho8lf228gh90m1fpnohf2008xrdxk
• http://www.openwall.com/lists/oss-security/2026/06/11/5
• https://access.redhat.com/errata/RHSA-2026:37390
• https://access.redhat.com/security/cve/CVE-2026-50628
• https://bugzilla.redhat.com/show_bug.cgi?id=2488302
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50628.json

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