{"id":"CVE-2026-93348","state":"PUBLISHED","title":"Unsloth Zoo Code Injection via model_type in config.json","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.","publishedAt":"2026-09-28T15:09:41.524Z","updatedAt":"2026-09-30T14:43:10.011Z","severity":{"score":8.6,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["unslothai unsloth-zoo","unslothai unsloth"],"affected":[{"vendor":"unslothai","product":"unsloth-zoo","packageURL":"pkg:github/unslothai/unsloth-zoo","defaultStatus":"unaffected","versions":[{"version":"2025.9.9","status":"affected","lessThan":"2026.8.14","versionType":"date"}],"repo":"https://github.com/unslothai/unsloth-zoo"},{"vendor":"unslothai","product":"unsloth","packageURL":"pkg:github/unslothai/unsloth","defaultStatus":"unaffected","versions":[{"version":"2025.9.9","status":"affected","lessThan":"2026.8.20","versionType":"date"}],"repo":"https://github.com/unslothai/unsloth"}],"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"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93348.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93348","state":"PUBLISHED","datePublished":"2026-09-28T15:09:41.524Z","dateUpdated":"2026-09-30T14:43:10.011Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-17T18:41:40.757Z"},"containers":{"cna":{"title":"Unsloth Zoo Code Injection via model_type in config.json","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'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."}],"affected":[{"vendor":"unslothai","product":"unsloth-zoo","packageURL":"pkg:github/unslothai/unsloth-zoo","defaultStatus":"unaffected","versions":[{"version":"2025.9.9","status":"affected","lessThan":"2026.8.14","versionType":"date"}],"repo":"https://github.com/unslothai/unsloth-zoo"},{"vendor":"unslothai","product":"unsloth","packageURL":"pkg:github/unslothai/unsloth","defaultStatus":"unaffected","versions":[{"version":"2025.9.9","status":"affected","lessThan":"2026.8.20","versionType":"date"}],"repo":"https://github.com/unslothai/unsloth"}],"references":[{"url":"https://github.com/unslothai/unsloth-zoo/pull/1083","name":"Pull Request (1)","tags":["patch","issue-tracking"]},{"url":"https://github.com/unslothai/unsloth-zoo/pull/1108","name":"Pull Request (2)","tags":["patch","issue-tracking"]},{"url":"https://github.com/unslothai/unsloth/commit/92ee0207a38ebc8af1a0e678aa92d7e7d901ea0d","name":"Unsloth Zoo Dependency Bump","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/unsloth-zoo-code-injection-via-model-type-in-config-json","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.6,"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"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","version":"3.1","baseSeverity":"HIGH","baseScore":8.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-28T15:09:41.524Z"},"tags":["x_open-source"],"datePublic":"2026-08-23T00:00:00.000Z","credits":[{"lang":"en","value":"Ariel Fogel (afogel) of Pillar Security","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T14:42:53.294398Z","id":"CVE-2026-93348","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T14:43:10.011Z"}}]}}}