EUVD-2026-78247
GHSA-h5x7-chgg-fqcc
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK
2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Sep 15, 2026
Path traversal in the Weights & Biases (wandb) Python client before 0.29.0 lets a malicious or compromised W&B backend push crafted file names through the File.download path, writing attacker-controlled files outside the intended download directory. Publicly available exploit code exists, and because arbitrary file writes can target shell startup files or Python import paths, successful abuse can escalate to code execution on the victim host. No CISA KEV listing has been reported, so exploitation appears to be proof-of-concept driven rather than confirmed widespread activity.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
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
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
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.
Technical POC Analysis
CWE-22.
Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.
Latest POC
1 PoC candidate from github (unverified)
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Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
HTML injection in wandb OpenUI up to version 1.0 allows remote unauthenticated attackers to inject arbitrary HTML via ma
Stored cross-site scripting (XSS) in wandb OpenUI up to version 1.0 via the Window Message Event Handler in frontend/pub
Information disclosure in wandb OpenUI up to version 1.0/3.5-turb allows authenticated local network attackers to expose
Wandb OpenUI up to version 1.0 contains hard-coded credentials exposure in backend/openui/config.py where the LITELLM_MA
Artifact Integrity Validation in wandb 0.25.2.dev1 uses MD5 (a cryptographically broken hash algorithm) within ArtifactM
Exploit-DB