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CVE-2020-8562

17
FAUCET Score

CVE-2020-8562 is a low-severity vulnerability affecting Kubernetes that allows a malicious actor to bypass proxy IP restrictions. By manipulating DNS resolution, an attacker could potentially access private networks on the control plane, despite Kubernetes' attempts to prevent access to link-local or localhost networks. This attack requires low privileges and high attack complexity, with a potential impact of limited confidentiality. There is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.18.18CPE matchmatch criteria
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
>= 1.19.0, <= 1.19.10CPE matchmatch criteria
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
>= 1.20.0, <= 1.20.6CPE matchmatch criteria
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
1.21.0CPE matchmatch criteria
cpe:2.3:a:kubernetes:kubernetes:1.21.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.1LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 57th percentile among its peer group of 1,638 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (7)

github_advisoryworkaround availablevia nvd_reference
View patch
check_pointvendor investigatingvia llm_extracted
View patch
chromevendor investigatingvia llm_extracted
View patch
infiniflowvendor investigatingvia llm_extracted
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: atomic-openshift
vuevendor investigatingvia llm_extracted
View patch

Vendor Advisories (6)

goGHSA-qh36-44jv-c8xjlow

Potential proxy IP restriction bypass in Kubernetes

Feb 2, 2022
redhatCVE-2020-8562Low

kubernetes: Bypass of Kubernetes API Server proxy TOCTOU

May 4, 2021
vuellm-vue-9d125b99fa4c9c11

Bypass of Kubernetes API Server proxy TOCTOU

chromellm-chrome-08f2411bed4d5a5a

Bypass of Kubernetes API Server proxy TOCTOU

check_pointllm-check_point-bb5680753e4697da

Bypass of Kubernetes API Server proxy TOCTOU

infiniflowllm-infiniflow-aee3bd73f486a66c

Bypass of Kubernetes API Server proxy TOCTOU

References

github.com / kubernetes/kubernetes/issues/101493
Issue TrackingMitigationThird Party Advisory
groups.google.com / g/kubernetes-security-announce/c/-MFX60_wdOY
Mailing ListThird Party Advisory
kubernetes.io / blog/2026/05/26/reconciling-unfixed-kubernetes-cves
security.netapp.com / advisory/ntap-20220225-0002
Third Party Advisory