What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-05 · updated 2026-09-23
• Weakness: CWE-829

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.

Affected products

• axolotl-ai-cloud axolotl: before 0.19.0 — fixed in 0.19.0

How to fix

Upgrade to a fixed version: axolotl-ai-cloud axolotl 0.19.0. Check the vendor advisory for mitigations.

References

• https://github.com/axolotl-ai-cloud/axolotl
• 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/commit/b62d60b101eea7f32532ee3c0b17c2f2430a9262
• https://github.com/axolotl-ai-cloud/axolotl/pull/3858
• https://github.com/axolotl-ai-cloud/axolotl/releases/tag/v0.19.0
• https://www.vulncheck.com/advisories/axolotl-through-0.18.0-remote-code-execution-via-multipack-patching

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