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Vulnerability record · CVE-2020-27836 · published 22 August 2022

CVE-2020-27836: Redhat openshift container platform incorrect permission assignment vulnerability

Redhat · Openshift Container Platform

A flaw was found in cluster-ingress-operator. A change to how the router-default service allows only certain IP source ranges could allow an attacker to access resources that would otherwise be restricted to specified IP ranges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability..

9.8 CVSS 3.1 Critical EPSS 1.2% · top 32.3% CWE-732 · Incorrect permission assignment
9.8CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

A flaw was found in cluster-ingress-operator. A change to how the router-default service allows only certain IP source ranges could allow an attacker to access resources that would otherwise be restricted to specified IP ranges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability..

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2020-27836 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1905490 Issue TrackingPermissions RequiredVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1906267 Issue TrackingPatchVendor Advisory
https://github.com/openshift/cluster-ingress-operator/pull/507/commits/92c83f281ba5fb6a1d91ecc3beaa4bcf2647a729 PatchThird Party Advisory
https://access.redhat.com/security/cve/CVE-2020-27836 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1905490 Issue TrackingPermissions RequiredVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1906267 Issue TrackingPatchVendor Advisory
https://github.com/openshift/cluster-ingress-operator/pull/507/commits/92c83f281ba5fb6a1d91ecc3beaa4bcf2647a729 PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-27836), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.