Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-91771— Weights & Biases wandb before 0.29.0 Path Traversal via File Download

Quick assessment

Affected
wandb wandb
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Weights & Biases wandb 在 0.29.0 之前的版本中， 函数未能对服务器响应中的文件名进行充分验证，从而允许路径穿越（Path Traversal）攻击。能够控制后端的攻击者可以携带目录穿越序列的文件名，将文件写入预期下载目录之外，进而通过修改 Shell 启动文件或 Python 导入路径，可能导致代码执行。

CVSS 8.8 · High
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-91771

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Weights & Biases wandb before 0.29.0 Path Traversal via File Download
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wandb wandb 0 ~ 0.29.0 -

II. Public POCs for CVE-2026-91771

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-91771

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-91771 (2)

Vendor Advisories for CVE-2026-91771 (1)

Proof of Concept for CVE-2026-91771 (2)

Vendor Pages for CVE-2026-91771 (1)

IV. Related Vulnerabilities

Same product: wandb
Same vendor: wandb
Same weakness: CWE-22

V. Comments for CVE-2026-91771

No comments yet

Leave a comment