SB2026070986 - Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.12
Published: July 9, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Prototype pollution (CVE-ID: CVE-2026-29063)
CWE-ID: CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes (\'Prototype Pollution\')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to modify object prototype attributes in affected JavaScript objects.
The vulnerability exists due to improper input validation in the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() functions when processing user-supplied input containing __proto__ properties. A remote attacker can send a specially crafted object input to pollute the prototype of base objects, leading to unauthorized property injection and potential privilege escalation.
Prototype pollution occurs without affecting the global Object.prototype, but injected properties can still be accessed through object property lookups even if not visible via Object.keys().
2) Improper Authorization (CVE-ID: CVE-2026-33186)
CWE-ID: CWE-285 - Improper Authorization
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to gain access to bypass authorization.
The vulnerability exists due to authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. A remote attacker can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server to bypass authorization.
Remediation
Install update from vendor's website.