CVE-2026-44513

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DiffusionPipeline.from_pretrained('/local/snapshot', trust_remote_code=False) where the snapshot contains custom component files (e.g. unet/my_unet_model.py) referenced from model_index.json \u2014 same root cause; the local path skipped download() and custom component code executed. 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Prior to 0.38.0, a trust_remote_code bypass in DiffusionPipeline.from_pretrained allows arbitrary remote code execution despite the user passing trust_remote_code=False (or omitting it, which is the default). The vulnerability has three variants, all sharing the same root cause \u2014 the trust_remote_code gate was implemented inside DiffusionPipeline.download() rather than at the actual dynamic-module load site, so any code path that bypassed or short-circuited download() also bypassed the security check. DiffusionPipeline.from_pretrained('repoA', custom_pipeline='attacker/repoB', trust_remote_code=False) \u2014 the gate evaluated against repoA's file list rather than repoB's, so repoB's pipeline.py was loaded and executed. DiffusionPipeline.from_pretrained('/local/snapshot', custom_pipeline='attacker/repoB', trust_remote_code=False) \u2014 the local-path branch never invoked download(), so the gate was never reached and remote code from repoB executed. DiffusionPipeline.from_pretrained('/local/snapshot', trust_remote_code=False) where the snapshot contains custom component files (e.g. unet/my_unet_model.py) referenced from model_index.json \u2014 same root cause; the local path skipped download() and custom component code executed. This vulnerability is fixed in 0.38.0."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-94", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-14T16:26:03.907Z"}}}, "cveMetadata": {"cveId": "CVE-2026-44513", "state": "PUBLISHED", "dateUpdated": "2026-08-28T12:04:31.466Z", "dateReserved": "2026-05-06T18:28:20.887Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-14T16:26:03.907Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

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{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:ai_inference_server:3"], "defaultStatus": "unaffected", "packageName": "rhaiis/vllm-cuda-rhel9", "product": "Red Hat AI Inference Server", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:ai_inference_server:3"], "defaultStatus": "unaffected", "packageName": "rhaiis/vllm-rocm-rhel9", "product": "Red Hat AI Inference Server", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:ai_inference_server:3"], "defaultStatus": "affected", "packageName": "rhaiis/vllm-tpu-rhel9", "product": "Red Hat AI Inference Server", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:ai_inference_server:3"], "defaultStatus": "affected", "packageName": "rhaii/vllm-cpu-rhel9", "product": "Red Hat AI Inference Server", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:ai_inference_server:3"], "defaultStatus": "affected", "packageName": "rhaii/vllm-cuda-rhel9", "product": "Red Hat AI Inference Server", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux_ai:3"], "defaultStatus": "affected", "packageName": "rhelai3/bootc-aws-cuda-rhel9", "product": "Red Hat Enterprise Linux AI (RHEL AI) 3", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux_ai:3"], "defaultStatus": "affected", "packageName": "rhelai3/bootc-azure-cuda-rhel9", "product": "Red Hat Enterprise Linux AI (RHEL AI) 3", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux_ai:3"], "defaultStatus": "affected", "packageName": "rhelai3/bootc-cuda-rhel9", "product": "Red Hat Enterprise Linux AI (RHEL AI) 3", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux_ai:3"], "defaultStatus": "affected", "packageName": "rhelai3/bootc-gcp-cuda-rhel9", "product": "Red Hat Enterprise Linux AI (RHEL AI) 3", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "affected", "packageName": "rhoai/odh-openvino-model-server-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "unaffected", "packageName": "rhoai/odh-th06-cuda130-torch291-py312-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:huggingface:diffusers:*:*:*:*:*:python:*:*", "matchCriteriaId": "D7F2A2AE-D122-46BA-BD64-67DCF4C22677", "versionEndExcluding": "0.38.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Diffusers is the a library for pretrained diffusion models. Prior to 0.38.0, a trust_remote_code bypass in DiffusionPipeline.from_pretrained allows arbitrary remote code execution despite the user passing trust_remote_code=False (or omitting it, which is the default). The vulnerability has three variants, all sharing the same root cause \u2014 the trust_remote_code gate was implemented inside DiffusionPipeline.download() rather than at the actual dynamic-module load site, so any code path that bypassed or short-circuited download() also bypassed the security check. DiffusionPipeline.from_pretrained('repoA', custom_pipeline='attacker/repoB', trust_remote_code=False) \u2014 the gate evaluated against repoA's file list rather than repoB's, so repoB's pipeline.py was loaded and executed. DiffusionPipeline.from_pretrained('/local/snapshot', custom_pipeline='attacker/repoB', trust_remote_code=False) \u2014 the local-path branch never invoked download(), so the gate was never reached and remote code from repoB executed. DiffusionPipeline.from_pretrained('/local/snapshot', trust_remote_code=False) where the snapshot contains custom component files (e.g. unet/my_unet_model.py) referenced from model_index.json \u2014 same root cause; the local path skipped download() and custom component code executed. This vulnerability is fixed in 0.38.0."}, {"lang": "es", "value": "Diffusers es la biblioteca para modelos de difusi\u00f3n preentrenados. Antes de la versi\u00f3n 0.38.0, una omisi\u00f3n de \u2019trust_remote_code\u2019 en DiffusionPipeline.from_pretrained permite la ejecuci\u00f3n remota de c\u00f3digo arbitraria a pesar de que el usuario pase \u2019trust_remote_code=False\u2019 (o lo omita, que es el valor predeterminado). La vulnerabilidad tiene tres variantes, todas compartiendo la misma causa ra\u00edz - la compuerta de \u2019trust_remote_code\u2019 se implement\u00f3 dentro de DiffusionPipeline.download() en lugar de en el sitio real de carga del m\u00f3dulo din\u00e1mico, por lo que cualquier ruta de c\u00f3digo que omitiera o cortocircuitara download() tambi\u00e9n omit\u00eda la verificaci\u00f3n de seguridad. DiffusionPipeline.from_pretrained(\u2019repoA\u2019, custom_pipeline=\u2019atacante/repoB\u2019, trust_remote_code=False) - la compuerta evalu\u00f3 la lista de archivos de repoA en lugar de la de repoB, por lo que el pipeline.py de repoB fue cargado y ejecutado. DiffusionPipeline.from_pretrained(\u2019/local/snapshot\u2019, custom_pipeline=\u2019atacante/repoB\u2019, trust_remote_code=False) - la rama de ruta local nunca invoc\u00f3 download(), por lo que la compuerta nunca fue alcanzada y el c\u00f3digo remoto de repoB se ejecut\u00f3. DiffusionPipeline.from_pretrained(\u2019/local/snapshot\u2019, trust_remote_code=False) donde la instant\u00e1nea contiene archivos de componentes personalizados (p. ej., unet/my_unet_model.py) referenciados desde model_index.json - misma causa ra\u00edz; la ruta local omiti\u00f3 download() y el c\u00f3digo del componente personalizado se ejecut\u00f3. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.38.0."}], "id": "CVE-2026-44513", "lastModified": "2026-10-26T14:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "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:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "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:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-44513", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-14T17:38:51.150920Z", "version": "2.0.3"}}]}, "published": "2026-05-14T17:16:22.903", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/huggingface/diffusers/security/advisories/GHSA-98h9-4798-4q5v"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:60520"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-44513"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477507"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44513.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-358"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.38.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "diffusers", "source": "cna", "vendor": "huggingface"}, "product": "diffusers", "vendor": "huggingface"}], "created": "2026-05-14T18:30:26.579366+00:00", "updated": "2026-08-14T03:15:12.999369+00:00", "vendors": ["huggingface", "huggingface$PRODUCT$diffusers"], "weaknesses": ["CWE-358", "CWE-94"]}