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TI-2020-16906 Aliases CVE-2020-27836

Incorrect permission assignment in cluster-ingress-operator

Priority MEDIUM 45CWE-732Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

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..

Why it matters now

EPSS 0.01241 69th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—cluster-ingress-operatorFixed in ose-cluster-ingress-operator-container-v4.6.0-202012161211.p0.—No fix listedCNA
  • cluster-ingress-operator Vendor— Affected Fixed in ose-cluster-ingress-operator-container-v4.6.0-202012161211.p0. Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*4.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0Running onRed Hat
  • cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:* Versions 4.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Running on ·Red Hat

Remediation

Red Hat 1 advisory

  • RHSA-2020:5614 Released 2020-12-21 · Red Hat rating Important
    OpenShift Container Platform 4.6.9 security and bug fix update
    • Red Hat OpenShift Container Platform 4.6 openshift4/ose-cluster-ingress-operator

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 4.6Fixed RHSA-2020:5614
Not affected: 1 product
  • Red Hat OpenShift Container Platform 4.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27836

References

Patch 2

Advisory 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-34021 Linux kernel skb coalescing drops shared-frag marker KEVCVSS 3.1HIGH 7.8
  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
See all 340 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences