What’s Vulnerable › Vulnerabilities
CVE-2020-8570: Kubernetes Java client libraries unvalidated path traversal in Copy implementation
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 3.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-01-21 · updated 2026-06-17
- Weakness: CWE-23
Description
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.
Affected products
- Kubernetes Java Client: before 9.0.2; from 10.0.0 before 10.0.1 — fixed in 10.0.1, 9.0.2
How to fix
Upgrade to a fixed version: Kubernetes Java Client 10.0.1, 9.0.2. Check the vendor advisory for mitigations.
References
- https://github.com/kubernetes-client/java/issues/1491
- https://groups.google.com/g/kubernetes-security-announce/c/sd5h73sFPrg
- https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E
- https://github.com/kubernetes-client/java/issues/1491
- https://groups.google.com/g/kubernetes-security-announce/c/sd5h73sFPrg
- https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E
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