Openshift/oauth-proxy: openshift/oauth-proxy: unauthenticated identity header injection on whitelisted paths
Published Aug 5, 2026
6.5
MEDIUMCVSS 3.1
EPSS 0.18%
Description
A flaw was found in openshift/oauth-proxy. On paths configured to bypass authentication (skip-auth-regex), the proxy forwards client-supplied identity headers (X-Forwarded-User, X-Forwarded-Email, X-Forwarded-Access-Token) to the upstream application without stripping them. An unauthenticated attacker can inject forged identity headers on whitelisted paths.
Affected products
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4 | affected |
|
No data.
No data.
Red Hat OpenShift Container Platform 4
openshift4/ose-oauth-proxy
Fix deferred
Red Hat OpenShift Container Platform 4
openshift4/ose-oauth-proxy-rhel9
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenShift Container Platform 4 | openshift4/ose-oauth-proxy | Fix deferred | n/a |
| Red Hat OpenShift Container Platform 4 | openshift4/ose-oauth-proxy-rhel9 | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
Vendor solution
Review and minimize skip-auth-regex configurations. Add middleware in upstream applications to ignore X-Forwarded-User on unauthenticated paths.
Red Hat mitigation
Review and minimize skip-auth-regex configurations. Add middleware in upstream applications to ignore X-Forwarded-User on unauthenticated paths.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Aug 6, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.18% (0.00185) | 7.32th | v5 (v2026.06.15) |
| Aug 6, 2026 | 0.13% (0.00130) | 3.03th | v5 (v2026.06.15) |
References (4)
- https://access.redhat.com/security/cve/CVE-2026-49331 vdb-entryx_refsource_REDHATVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2483252 issue-trackingx_refsource_REDHATIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-49331
- https://www.cve.org/CVERecord?id=CVE-2026-49331
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-49331 | vdb-entryx_refsource_REDHATVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2483252 | issue-trackingx_refsource_REDHATIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-49331 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-49331 |
Change history (0)
No recorded changes yet.