{"id":"CVE-2026-91771","revision":null,"records":[{"revision":"c2a952287338498382ea4f4da2b58ffc","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-91771","aliases":[],"title":"Weights & Biases wandb before 0.29.0 Path Traversal via File Download","description":"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.","state":0,"publishedAt":"2026-09-15T01:20:33.139+00:00","modifiedAt":"2026-09-24T14:22:24.022+00:00","affected":[{"ecosystem":"Vendor product","name":"wandb","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"wandb\",\n                    \"product\": \"wandb\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/wandb\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"0.29.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"},{"system":"CVSS 4.0","vector":"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","score":8.7,"severity":"HIGH"}],"references":["https://github.com/wandb/wandb/issues/12592","https://github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6","https://github.com/wandb/wandb/releases/tag/v0.29.0","https://github.com/wandb/wandb/blob/v0.27.2/wandb/apis/public/files.py#L319-L347","https://github.com/wandb/wandb","https://www.vulncheck.com/advisories/weights-biases-wandb-before-0.29.0-path-traversal-via-file-download"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-91771","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-91771","identifiers":["CVE-2026-91771"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-12T13:16:42.2781808+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T13:16:42.2781808+00:00","lastSuccessAt":"2026-11-12T13:17:21.262797+00:00","error":null,"lastVerifiedAt":"2026-11-12T13:17:21.2627987+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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