Unsloth Zoo Code Injection via model_type in config.json
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.
CVE-2026-93348
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93348
unsloth-zoo
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
unsloth
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/unslothai/unsloth-zoo",
"vendor": "unslothai",
"product": "unsloth-zoo",
"versions": [
{
"status": "affected",
"version": "2025.9.9",
"lessThan": "2026.8.14",
"versionType": "date"
}
],
"packageURL": "pkg:github/unslothai/unsloth-zoo",
"defaultStatus": "unaffected"
},
{
"repo": "https://github.com/unslothai/unsloth",
"vendor": "unslothai",
"product": "unsloth",
"versions": [
{
"status": "affected",
"version": "2025.9.9",
"lessThan": "2026.8.20",
"versionType": "date"
}
],
"packageURL": "pkg:github/unslothai/unsloth",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-93348
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #4432 · Revision 1
- Added to Heist Feed
- Publisher date