Unsloth Zoo Code Injection via model_type in config.json (CVE-2026-93348) | HOL Guard CVE

High · CVSS 8.6CVE-2026-93348

Unsloth Zoo Code Injection via model_type in config.json

Answer in brief

CVE-2026-93348 records a High severity (CVSS 8.6) vulnerability in Unsloth Zoo Code Injection via model_type in config.json. The current sources do not mark it as known exploited. The current feed maps unslothai/unsloth (generic), unslothai/unsloth-zoo (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 28, 2026Updated Sep 28, 2026Source checked Sep 28, 2026First seen by HOL Sep 28, 2026Material review Sep 28, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.6
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps unslothai/unsloth (generic), unslothai/unsloth-zoo (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
unslothai/unslothgeneric	>=2025.9.9 <2026.8.20	2026.8.20
unslothai/unsloth-zoogeneric	>=2025.9.9 <2026.8.14	2026.8.14

Recommended response

Check inventory. Check lockfiles and deployed manifests for unslothai/unsloth, unslothai/unsloth-zoo.
Review the reported fix. Update unslothai/unsloth to 2026.8.20; unslothai/unsloth-zoo to 2026.8.14 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.