{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91771", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-15T00:45:12.423Z", "datePublished": "2026-09-15T01:20:33.139Z", "dateUpdated": "2026-09-15T01:20:33.139Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-15T01:20:33.139Z"}, "datePublic": "2026-08-26T00:00:00.000Z", "title": "Weights & Biases wandb before 0.29.0 Path Traversal via File Download", "descriptions": [{"lang": "en", "value": "Weights & Biases wandb before 0.29.0 fails to validate the file name from server responses in the File.download function, allowing path traversal attacks. Attackers controlling the backend can supply file names with directory traversal sequences to write files outside the intended download directory, potentially enabling code execution through modification of shell startup files or Python import paths."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "cweId": "CWE-22", "type": "CWE"}]}], "affected": [{"vendor": "wandb", "product": "wandb", "defaultStatus": "unaffected", "packageURL": "pkg:pypi/wandb", "versions": [{"version": "0", "lessThan": "0.29.0", "status": "affected", "versionType": "semver"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/wandb/wandb/issues/12592", "tags": ["issue-tracking"]}, {"url": "https://github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6", "tags": ["patch"]}, {"url": "https://github.com/wandb/wandb/releases/tag/v0.29.0", "tags": ["release-notes"], "name": "wandb v0.29.0 Release Notes"}, {"url": "https://github.com/wandb/wandb/blob/v0.27.2/wandb/apis/public/files.py#L319-L347", "tags": ["technical-description"]}, {"url": "https://github.com/wandb/wandb", "tags": ["product"]}, {"name": "VulnCheck Advisory: Weights & Biases wandb before 0.29.0 Path Traversal via File Download", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/weights-biases-wandb-before-0.29.0-path-traversal-via-file-download"}], "credits": [{"lang": "en", "value": "George Chen", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:pypi/wandb", "product": "wandb", "vendor": "wandb", "versions": [{"lessThan": "0.29.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Weights & Biases wandb before 0.29.0 fails to validate the file name from server responses in the File.download function, allowing path traversal attacks. Attackers controlling the backend can supply file names with directory traversal sequences to write files outside the intended download directory, potentially enabling code execution through modification of shell startup files or Python import paths."}], "id": "CVE-2026-91771", "lastModified": "2026-09-15T02:16:49.680", "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": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "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:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-09-15T02:16:49.680", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/wandb/wandb"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/wandb/wandb/blob/v0.27.2/wandb/apis/public/files.py#L319-L347"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/wandb/wandb/issues/12592"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/wandb/wandb/releases/tag/v0.29.0"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/weights-biases-wandb-before-0.29.0-path-traversal-via-file-download"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{"bugzilla": {"description": "wandb: wandb: Arbitrary code execution via path traversal in file download", "id": "2533555", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533555"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-22", "details": ["A flaw was found in Weights & Biases wandb. This vulnerability allows attackers controlling the backend to supply file names with directory traversal sequences during file download operations. This can lead to writing files outside the intended download directory, potentially enabling arbitrary code execution through modification of shell startup files or Python import paths."], "name": "CVE-2026-91771", "package_state": [{"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Affected", "package_name": "exploit-intelligence-tech-preview/vulnerability-analysis-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:ai_inference_server:3", "fix_state": "Affected", "package_name": "rhaiis/vllm-cpu-rhel9", "product_name": "Red Hat AI Inference Server"}, {"cpe": "cpe:/a:redhat:ai_inference_server:3", "fix_state": "Affected", "package_name": "rhaiis/vllm-tpu-rhel9", "product_name": "Red Hat AI Inference Server"}], "public_date": "2026-09-15T01:20:33Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-91771\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-91771\nhttps://github.com/wandb/wandb\nhttps://github.com/wandb/wandb/blob/v0.27.2/wandb/apis/public/files.py#L319-L347\nhttps://github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6\nhttps://github.com/wandb/wandb/issues/12592\nhttps://github.com/wandb/wandb/releases/tag/v0.29.0\nhttps://www.vulncheck.com/advisories/weights-biases-wandb-before-0.29.0-path-traversal-via-file-download"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.29.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "wandb", "source": "cna", "vendor": "wandb"}, "product": "wandb", "vendor": "wandb"}], "created": "2026-09-15T06:30:15.467759+00:00", "updated": "2026-09-15T08:45:17.502431+00:00", "vendors": ["wandb", "wandb$PRODUCT$wandb"]}