CVE-2026-91771Weights & Biases wandb before 0.29.0 Path Traversal via File Download
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wandb wandb wandb:wandb (from the name) | before 0.29.0 | CNA record |
References
- https://github.com/wandb/wandb/issues/12592issue-tracking
- https://github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6patch
- https://github.com/wandb/wandb/releases/tag/v0.29.0release-notes
- https://github.com/wandb/wandb/blob/v0.27.2/wandb/apis/public/files.py#L319-L347technical-description
- https://github.com/wandb/wandbproduct
- https://www.vulncheck.com/advisories/weights-biases-wandb-before-0.29.0-path-traversal-via-file-downloadthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.