TI-2026-61982 Aliases CVE-2026-91771 GHSA-h5x7-chgg-fqcc

Weights & Biases wandb before 0.29.0 Path Traversal via File Download

MEDIUM 42CWE-22Published 2026-09-15 · Updated 2026-09-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01167 67th percentileScored 2026-11-07

Fix Partial wandb (wandb): 0.29.0Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
wandb	wandb	before 0.29.0	0.29.0	Patch available	CNA

wandb Vendorwandb Affected before 0.29.0 Fixed in 0.29.0 Patch available CNA

Remediation

Fix · CNA wandb (wandb) Fixed in 0.29.0

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Exploit Intelligence	Affected	No fix planned: Will not fix
Red Hat AI Inference Server	Affected	No fix planned: Will not fix

Timeline

2026-10-02 Threatist record created from CVE-2026-91771
2026-10-03 Alias added: GHSA-h5x7-chgg-fqcc
2026-10-06 Affected versions changed · Red Hat

References

Patch 1

https://github.com/wandb/wandb/commit/e52558f3a6a94ea816af74969a13a35e5904cad6

Other 4

TI-2024-09867 Unauthenticated File Upload in wandb/openui CVSS 3.0MEDIUM 6.1
TI-2025-00151 Stored Cross-site Scripting (XSS) in wandb/openui CVSS 3.0MEDIUM 5.4
TI-2026-04352 wandb OpenUI HTMLAnnotator server.py get_share HTML injection CVSS 4.0MEDIUM 5.3
TI-2026-04355 wandb OpenUI Window Message Event index.html cross site scripting CVSS 4.0MEDIUM 5.1
TI-2026-04354 wandb OpenUI APIStatusError server.py generic_exception_handler information exposure CVSS 4.0MEDIUM 5.1
TI-2026-04353 wandb OpenUI config.py hard-coded credentials CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences