CVE-2020-8570
Kubernetes Java client libraries unvalidated path traversal in Copy implementation
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
- Record
CVE-2020-8570- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:P - Weakness
- CWE-23, CWE-22
- Updated
- 2026-11-02
CVE List No score
Kubernetes Java client libraries unvalidated path traversal in Copy implementation
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
- Record
CVE-2020-8570- Weakness
- CWE-23
- Updated
- 2026-11-02
EUVDEUVD-2021-0501 No score
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
- Record
EUVD-2021-0501- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cghx-9gcr-r42x
Path Traversal in the Java Kubernetes Client
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
- Record
GHSA-cghx-9gcr-r42x- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
- Record
CVE-2020-8570- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-cghx-9gcr-r42x
Path Traversal in the Java Kubernetes Client
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
- Record
GHSA-cghx-9gcr-r42x- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.kubernetes:client-javaMaven |
before 9.0.2 | 9.0.2 |
io.kubernetes:client-javaMaven |
10.0.0 to 10.0.0 | 10.0.1 |
io.kubernetes:client-javaMaven |
before 9.0.2, plus listed versions 0.10.21.0.01.0.0-beta11.0.0-beta2 Show 18 moreShow less1.0.0-beta31.0.0-beta42.0.02.0.0-beta12.0.0-beta23.0.03.0.0-beta13.0.0-beta24.0.04.0.0-beta15.0.06.0.17.0.08.0.08.0.0-alpha18.0.29.0.09.0.1 |
9.0.2 |
io.kubernetes:client-javaMaven |
10.0.0 up to 10.0.1 | 10.0.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | shoucheng3/kubernetes-client__java_CVE-2020-8570_client-java-parent-9_0_2_fixed | 2025-09-06 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits | PoC in GitHub | |
| exploits, facts | PoC in GitHub | |
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-8570 is a critical vulnerability (CVSS 9.1) in Kubernetes Java, published January 21, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.69%, the 89th percentile. Fixed in io.kubernetes:client-java 9.0.2.
References
groups.google.com/g/kubernetes-security-announce/c/sd5h73sFPrg
github.com/kubernetes-client/java/issues/1491
lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E
Show 9 moreShow less
nvd.nist.gov/vuln/detail/CVE-2020-8570