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CVE-2026-93348 (GCVE-0-2026-93348)

Vulnerability from nvd – Published: 2026-09-28 15:09 – Updated: 2026-09-28 15:09 X_Open Source

Title

Unsloth Zoo Code Injection via model_type in config.json

Summary

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.

Severity

8.6 (High)


                        
                          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

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/unslothai/unsloth-zoo/pull/1083	patchissue-tracking
https://github.com/unslothai/unsloth-zoo/pull/1108	patchissue-tracking
https://github.com/unslothai/unsloth/commit/92ee0…	patch
https://www.vulncheck.com/advisories/unsloth-zoo-…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
unslothai	unsloth-zoo	Affected: 2025.9.9 , < 2026.8.14 (date)
unslothai	unsloth	Affected: 2025.9.9 , < 2026.8.20 (date)

Date Public

2026-08-23 00:00

Credits

Ariel Fogel (afogel) of Pillar Security

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/unslothai/unsloth-zoo",
          "product": "unsloth-zoo",
          "repo": "https://github.com/unslothai/unsloth-zoo",
          "vendor": "unslothai",
          "versions": [
            {
              "lessThan": "2026.8.14",
              "status": "affected",
              "version": "2025.9.9",
              "versionType": "date"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/unslothai/unsloth",
          "product": "unsloth",
          "repo": "https://github.com/unslothai/unsloth",
          "vendor": "unslothai",
          "versions": [
            {
              "lessThan": "2026.8.20",
              "status": "affected",
              "version": "2025.9.9",
              "versionType": "date"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ariel Fogel (afogel) of Pillar Security"
        }
      ],
      "datePublic": "2026-08-23T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
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          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T15:09:41.524Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Pull Request (1)",
          "tags": [
            "patch",
            "issue-tracking"
          ],
          "url": "https://github.com/unslothai/unsloth-zoo/pull/1083"
        },
        {
          "name": "Pull Request (2)",
          "tags": [
            "patch",
            "issue-tracking"
          ],
          "url": "https://github.com/unslothai/unsloth-zoo/pull/1108"
        },
        {
          "name": "Unsloth Zoo Dependency Bump",
          "tags": [
            "patch"
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          "url": "https://github.com/unslothai/unsloth/commit/92ee0207a38ebc8af1a0e678aa92d7e7d901ea0d"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/unsloth-zoo-code-injection-via-model-type-in-config-json"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "Unsloth Zoo Code Injection via model_type in config.json",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-93348",
    "datePublished": "2026-09-28T15:09:41.524Z",
    "dateReserved": "2026-09-17T18:41:40.757Z",
    "dateUpdated": "2026-09-28T15:09:41.524Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-93348 (GCVE-0-2026-93348)

Vulnerability from cvelistv5 – Published: 2026-09-28 15:09 – Updated: 2026-09-28 15:09 X_Open Source

Title

Unsloth Zoo Code Injection via model_type in config.json

Summary

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.

Severity

8.6 (High)


                        
                          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

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/unslothai/unsloth-zoo/pull/1083	patchissue-tracking
https://github.com/unslothai/unsloth-zoo/pull/1108	patchissue-tracking
https://github.com/unslothai/unsloth/commit/92ee0…	patch
https://www.vulncheck.com/advisories/unsloth-zoo-…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
unslothai	unsloth-zoo	Affected: 2025.9.9 , < 2026.8.14 (date)
unslothai	unsloth	Affected: 2025.9.9 , < 2026.8.20 (date)

Date Public

2026-08-23 00:00

Credits

Ariel Fogel (afogel) of Pillar Security

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/unslothai/unsloth-zoo",
          "product": "unsloth-zoo",
          "repo": "https://github.com/unslothai/unsloth-zoo",
          "vendor": "unslothai",
          "versions": [
            {
              "lessThan": "2026.8.14",
              "status": "affected",
              "version": "2025.9.9",
              "versionType": "date"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/unslothai/unsloth",
          "product": "unsloth",
          "repo": "https://github.com/unslothai/unsloth",
          "vendor": "unslothai",
          "versions": [
            {
              "lessThan": "2026.8.20",
              "status": "affected",
              "version": "2025.9.9",
              "versionType": "date"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ariel Fogel (afogel) of Pillar Security"
        }
      ],
      "datePublic": "2026-08-23T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
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            {
              "lang": "en",
              "value": "GENERAL"
            }
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              "cweId": "CWE-94",
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T15:09:41.524Z",
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          "name": "Pull Request (1)",
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          "url": "https://github.com/unslothai/unsloth-zoo/pull/1083"
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        {
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          ],
          "url": "https://github.com/unslothai/unsloth-zoo/pull/1108"
        },
        {
          "name": "Unsloth Zoo Dependency Bump",
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        }
      ],
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      },
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    "dateReserved": "2026-09-17T18:41:40.757Z",
    "dateUpdated": "2026-09-28T15:09:41.524Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

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2 vulnerabilities by unslothai

CVE-2026-93348 (GCVE-0-2026-93348)

CVE-2026-93348 (GCVE-0-2026-93348)