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VulnerabilityPublished Updated

CVE-2026-49332: Red Hat OpenShift Container Platform 4.12 · Interpretation Conflict

Affects Red Hat OpenShift Container Platform 4.12Source CVE Database V5

0

Not known to be exploited · CVSS 8.5 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
8.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat OpenShift Container Platform 4.12Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.13Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.14Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.15Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.16Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.17Affected–Fixed in–

AI-suggested

Red Hat advises hardening upstream applications by validating the X-Forwarded-User header against the expected authenticated session identity and rejecting requests where these do not match. Additionally, Red Hat has released a security update in OpenShift Container Platform 4.21.28 that addresses this issue. Users should upgrade to this or later versions to apply the official fix. Patch status for version 4.20 is not explicitly stated; check Red Hat advisories for updates. No indication that the vulnerability is mitigated without action.

Description

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.

References

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