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Vulnerability record · CVE-2020-8554 · published 21 January 2021

CVE-2020-8554: Kubernetes vulnerability

Kubernetes · Kubernetes

Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

5.0 CVSS 3.1 Medium EPSS 9.3% · top 4.8% CWE-283 · CWE-283
5.0CVSS 3.1 base score, v2 6.0
9.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
19References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

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

Affected products

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

References

LinkTags
https://github.com/kubernetes/kubernetes/issues/97076 ExploitThird Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8 Mailing ListThird Party Advisory
https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/
https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache
https://www.oracle.com//security-alerts/cpujul2021.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html PatchThird Party Advisory
https://github.com/kubernetes/kubernetes/issues/97076 ExploitThird Party Advisory
https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8 Mailing ListThird Party Advisory
https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache
https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache
https://www.oracle.com//security-alerts/cpujul2021.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-8554), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.