Apache Syncope 4.2.2/4.1.7 OAuthRequestFilter IP Check Logic Error
CVE-2026-50628 Published on June 12, 2026
Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control
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, which fixes this issue.
Vulnerability Analysis
CVE-2026-50628 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Types
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Improperly Implemented Security Check for Standard
The software does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.
Products Associated with CVE-2026-50628
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Affected Versions
Apache Software Foundation Apache CXF:- Version 4.2.0 and below 4.2.2 is affected.
- Before 4.1.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.