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CVE-2020-8555

Kubernetes kube-controller-manager SSRF

6.3 MediumFix available

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

3.68%Up 2.4 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 6.3

Kubernetes kube-controller-manager SSRF

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
CVE-2020-8555
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-918
Updated
2026-11-02
EUVDEUVD-2022-1249 6.3

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
EUVD-2022-1249
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-x6mj-w4jf-jmgw 6.3

Server Side Request Forgery (SSRF) in Kubernetes

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
GHSA-x6mj-w4jf-jmgw
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-918
Updated
2026-11-02
NVD 6.3

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
CVE-2020-8555
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS 2.0
3.5 LowAV:N/AC:M/Au:S/C:P/I:N/A:N
Weakness
CWE-918
Updated
2026-11-02
OSVALPINE-CVE-2020-8555 6.3

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
ALPINE-CVE-2020-8555
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-03
OSV 6.3

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
CVE-2020-8555
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
Show 9 moreShow less
OSVDEBIAN-CVE-2020-8555 6.3

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
DEBIAN-CVE-2020-8555
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVGHSA-x6mj-w4jf-jmgw 6.3

Server Side Request Forgery (SSRF) in Kubernetes

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
GHSA-x6mj-w4jf-jmgw
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-918
Updated
2026-11-02
OSVRHSA-2020:2440 6.3

Red Hat Security Advisory: OpenShift Container Platform 4.3.25 openshift security update

Record
RHSA-2020:2440
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVRHSA-2020:2448 6.3

Red Hat Security Advisory: OpenShift Container Platform 4.4.8 openshift security update

Record
RHSA-2020:2448
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVRHSA-2020:2479 6.5

Red Hat Security Advisory: OpenShift Container Platform 3.11 atomic-openshift security update

Record
RHSA-2020:2479
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2020:2594 6.3

Red Hat Security Advisory: OpenShift Container Platform 4.2.36 openshift security update

Record
RHSA-2020:2594
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2020-8555 6.3

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Record
UBUNTU-CVE-2020-8555
CVSS 3.1
6.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVGO-2022-0890 No score

Server Side Request Forgery (SSRF) in Kubernetes in k8s.io/kubernetes

Server Side Request Forgery (SSRF) in Kubernetes in k8s.io/kubernetes

Record
GO-2022-0890
Updated
2026-11-02
OSVopenSUSE-SU-2025:15424-1 No score

govulncheck-vulndb-0.0.20250807T150727-1.1 on GA media

These are all security issues fixed in the govulncheck-vulndb-0.0.20250807T150727-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15424-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
k8s.io/kubernetes
Go
 1.18.0 up to 1.18.1
1.18.1
k8s.io/kubernetes
Go
 1.17.0 up to 1.17.4
1.17.4
k8s.io/kubernetes
Go
 1.16.0 up to 1.16.9
1.16.9
k8s.io/kubernetes
Go
 before 1.15.12
1.15.12
k3s
Alpine:v3.13
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.14
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.15
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.16
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.17
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.18
 before 1.18.3.1-r0
1.18.3.1-r0
Show 36 moreShow less
Affected packages
PackageAffectedFixed
k3s
Alpine:v3.19
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.20
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.21
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.22
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.23
 before 1.18.3.1-r0
1.18.3.1-r0
k3s
Alpine:v3.24
 before 1.18.3.1-r0
1.18.3.1-r0
kubernetes
Debian:12
 before 1.18.2-1
1.18.2-1
kubernetes
Debian:13
 before 1.18.2-1
1.18.2-1
kubernetes
Debian:14
 before 1.18.2-1
1.18.2-1
k8s.io/kubernetes
Go
 before 1.15.12, 1.16.0 up to 1.16.9, 1.17.0 up to 1.17.4, 1.18.0 up to 1.18.1
1.15.121.16.91.17.41.18.1
openshift
Red Hat:openshift:4.3::el7
 before 0:4.3.25-202006060952.git.1.96c30f6.el7
0:4.3.25-202006060952.git.1.96c30f6.el7
openshift-hyperkube
Red Hat:openshift:4.3::el7
 before 0:4.3.25-202006060952.git.1.96c30f6.el7
0:4.3.25-202006060952.git.1.96c30f6.el7
openshift
Red Hat:openshift:4.3::el8
 before 0:4.3.25-202006060952.git.1.96c30f6.el8
0:4.3.25-202006060952.git.1.96c30f6.el8
openshift-hyperkube
Red Hat:openshift:4.3::el8
 before 0:4.3.25-202006060952.git.1.96c30f6.el8
0:4.3.25-202006060952.git.1.96c30f6.el8
openshift
Red Hat:openshift:4.4::el7
 before 0:4.4.0-202006061254.git.1.dc84fb4.el7
0:4.4.0-202006061254.git.1.dc84fb4.el7
openshift-hyperkube
Red Hat:openshift:4.4::el7
 before 0:4.4.0-202006061254.git.1.dc84fb4.el7
0:4.4.0-202006061254.git.1.dc84fb4.el7
openshift
Red Hat:openshift:4.4::el8
 before 0:4.4.0-202006061254.git.1.dc84fb4.el8
0:4.4.0-202006061254.git.1.dc84fb4.el8
openshift-hyperkube
Red Hat:openshift:4.4::el8
 before 0:4.4.0-202006061254.git.1.dc84fb4.el8
0:4.4.0-202006061254.git.1.dc84fb4.el8
atomic-openshift
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-clients
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-clients-redistributable
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-docker-excluder
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-excluder
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-hyperkube
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-hypershift
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-master
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-node
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-pod
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-sdn-ovs
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-template-service-broker
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-tests
Red Hat:openshift:3.11::el7
 before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
openshift
Red Hat:openshift:4.2::el7
 before 0:4.2.36-202006211650.p0.git.0.1fe246f.el7
0:4.2.36-202006211650.p0.git.0.1fe246f.el7
openshift-hyperkube
Red Hat:openshift:4.2::el7
 before 0:4.2.36-202006211650.p0.git.0.1fe246f.el7
0:4.2.36-202006211650.p0.git.0.1fe246f.el7
openshift
Red Hat:openshift:4.2::el8
 before 0:4.2.36-202006211650.p0.git.0.1fe246f.el8
0:4.2.36-202006211650.p0.git.0.1fe246f.el8
openshift-hyperkube
Red Hat:openshift:4.2::el8
 before 0:4.2.36-202006211650.p0.git.0.1fe246f.el8
0:4.2.36-202006211650.p0.git.0.1fe246f.el8
govulncheck-vulndb
openSUSE:Tumbleweed
 before 0.0.20250807T150727-1.1
0.0.20250807T150727-1.1

History

History
RecordedChangedSources
affected, aliases, referencesOSV
affected
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-8555 is a medium vulnerability (CVSS 6.3) in Kubernetes, published June 4, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.68%, the 89th percentile. Fixed in k8s.io/kubernetes 1.18.1.

References

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