Vulnerability · Published Aug 5, 2026 · Assigned by redhat

CVE-2026-49331Openshift/oauth-proxy: openshift/oauth-proxy: unauthenticated identity header injection on whitelisted paths

Medium 6.5

In plain English

A medium-severity insufficient verification of data authenticity in Red Hat OpenShift Container Platform 4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 91.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Red Hat	Red Hat OpenShift Container Platform 4	see references
Red Hat	Red Hat OpenShift Container Platform 4	see references

Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

https://access.redhat.com/security/cve/CVE-2026-49331 vdb-entry, x_refsource_REDHAT
RHBZ#2483252 issue-tracking, x_refsource_REDHAT