CVE-2026-91771: Weights & Biases wandb before 0.29.0 Path Traversal via File Download
High · CVSS 8.8 (CVSS 3.1)EPSS 1.2%, 67th percentilePublished Updated Assigner: VulnCheck
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · CWE-22
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
wandb: wandb
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/wandb/wandb (opens in new tab)
- github.com/wandb/wandb/blob/v0.27.2/wandb/apis/public/files.py (opens in new tab)
- github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6 (opens in new tab)
- github.com/wandb/wandb/issues/12592 (opens in new tab)
- github.com/wandb/wandb/releases/tag/v0.29.0 (opens in new tab)
- www.vulncheck.com/advisories/weights-biases-wandb-before-0.29.0-path-traversal-via-file… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)