How severe is CVE-2020-27836?

CVE-2020-27836 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-27836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27836?

CVE-2020-27836 affects Redhat Openshift Container Platform. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27836?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-27836 published?

CVE-2020-27836 was published on 2022-08-22 and last updated on 2026-06-17.

CVE-2020-27836

CVE-2020-27836 is a critical-severity vulnerability in Redhat Openshift Container Platform with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Redhat Openshift Container Platform
Published: 2022-08-22
Last modified: 2026-06-17

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..

Frequently asked questions

What is CVE-2020-27836?: 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..
How severe is CVE-2020-27836?: CVE-2020-27836 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-27836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27836?: CVE-2020-27836 affects Redhat Openshift Container Platform. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-27836 published?: CVE-2020-27836 was published on 2022-08-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*

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