{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39378", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-06T21:29:17.350Z", "datePublished": "2026-04-21T00:17:00.684Z", "dateUpdated": "2026-04-21T00:17:00.684Z"}, "containers": {"cna": {"title": "nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-73", "lang": "en", "description": "CWE-73: External Control of File Name or Path", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9"}, {"name": "https://github.com/jupyter/nbconvert/releases/tag/v7.17.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/jupyter/nbconvert/releases/tag/v7.17.1"}], "affected": [{"vendor": "jupyter", "product": "nbconvert", "versions": [{"version": ">= 6.5, < 7.17.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-21T00:17:00.684Z"}, "descriptions": [{"lang": "en", "value": "The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. In versions 6.5 through 7.17.0, when `HTMLExporter.embed_images=True`, nbconvert's markdown renderer allows arbitrary file read via path traversal in image references. A malicious notebook can exfiltrate sensitive files from the conversion host by embedding them as base64 data URIs in the output HTML. nbconvert 7.17.1 contains a fix. As a workaround, do not enable `HTMLExporter.embed_images`; it is not enabled by default."}], "source": {"advisory": "GHSA-7jqv-fw35-gmx9", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. In versions 6.5 through 7.17.0, when `HTMLExporter.embed_images=True`, nbconvert's markdown renderer allows arbitrary file read via path traversal in image references. A malicious notebook can exfiltrate sensitive files from the conversion host by embedding them as base64 data URIs in the output HTML. nbconvert 7.17.1 contains a fix. As a workaround, do not enable `HTMLExporter.embed_images`; it is not enabled by default."}], "id": "CVE-2026-39378", "lastModified": "2026-04-21T01:16:06.073", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-21T01:16:06.073", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/jupyter/nbconvert/releases/tag/v7.17.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-73"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.5,7.17.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nbconvert", "source": "cna", "vendor": "jupyter"}, "product": "nbconvert", "vendor": "jupyter"}], "created": "2026-04-21T02:30:25.669575+00:00", "updated": "2026-04-21T02:30:25.669627+00:00", "vendors": ["jupyter", "jupyter$PRODUCT$nbconvert"]}