EUVD-2026-49767
GHSA-f2m2-cc3f-h4j2
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V4 - API and Web Service Interpretation consistency
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Alert meAnalysisAIv1 – Jul 28, 2026
Identity header smuggling in OpenShift Container Platform 4.x allows authenticated low-privilege users to escalate privileges by injecting forged identity headers that upstream applications may trust. The oauth-proxy fails to strip underscore-variant headers, enabling WSGI and PHP frameworks to normalize them into the legitimate identity, potentially overriding the true authenticated user. No known active exploitation or public exploit code has been identified.
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
DescriptionCVE.org
A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application.
Articles & Coverage 1
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)CVE.org
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Exploit-DB