It was found in OpenShift before version 4.8 that the generated certificate for the in-cluster Service CA incorrectly included additional certificates. The Service CA is automatically mounted into all pods allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.
| Reporter | Title | Published | Views | Family All 21 |
|---|---|---|---|---|
 | Security Bulletin: Red Hat OpenShift on IBM Cloud is affected by an OpenShift security vulnerability (CVE-2021-3636) | 17 Nov 202115:55 | – | ibm |
 | CVE-2021-3636 | 30 Jul 202120:15 | – | attackerkb |
 | OpenShift Certificate Authenticity Misuse | 9 Aug 202100:00 | – | bdu_fstec |
 | Red Hat OpenShift Authorization Vulnerability | 14 Jul 202100:00 | – | cnnvd |
 | Red Hat OpenShift has unexplained holes | 15 Jul 202100:00 | – | cnvd |
 | CVE-2021-3636 | 30 Jul 202119:27 | – | cve |
 | CVE-2021-3636 | 30 Jul 202119:27 | – | cvelist |
 | EUVD-2021-26937 | 7 Oct 202500:30 | – | euvd |
 | CVE-2021-3636 | 30 Jul 202119:27 | – | mend |
 | CVE-2021-3636 | 30 Jul 202120:15 | – | nvd |
10
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13 Aug 2026 04:46Current
5.9Medium risk
Vulners AI Score5.9
CVSS 24.1
CVSS 3.14.6
EPSS0.00284