Bug 2533555 (CVE-2026-91771)

Summary: CVE-2026-91771 wandb: wandb: Arbitrary code execution via path traversal in file download
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: alinfoot, dtrifiro, weaton
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-09-15 01:41:23 UTC
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.