401 Client Error: Unauthorized for url:

[KingTurbo]

Describe bug

An issue occurs when attempting to fetch stock information using the yfinance library. The request results in a 401 Client Error: Unauthorized.

import yfinance as yf

msft = yf.Ticker("MSFT")

get all stock info

msft.info

401 Client Error: Unauthorized for url: https://query2.finance.yahoo.com/v10/finance/quoteSummary/MSFT?modules=financialData%2CquoteType%2CdefaultKeyStatistics%2CassetProfile%2CsummaryDetail&corsDomain=finance.yahoo.com&formatted=false&symbol=MSFT&crumb=2abgHhN2kUC

Environment:

Operating System: Windows 10, Windows 11
Region: Europe
both current yfinance version

Simple code that reproduces your problem

import yfinance as yf

msft = yf.Ticker("MSFT")

get all stock info

msft.info

Debug log

...

Bad data proof

No response

yfinance version

0.2.40

Python version

Python 3.11.4

Operating system

W10/11

[SC8198]

Having same issues.

Operating system
Linux

Region: USA

yfinance version
0.2.40

[justmessingaround]

Same issue also.

[apenake]

Same issue - worked fine a few days ago. Upgrading yfinance does not solve:
OS: Mac 13.2.1
Region: USA
Python: 3.11.4
yfinance: 0.2.40

[stan-artemyev]

Same issue - worked earlier today.
OS: Mac 14.5
Python: 3.12.3
yfinance: latest 0.2.40

[GongXiangbo]

Same issue - worked fine few hours ago

OS: Windows 11
Region: Italy
Python: 3.12.3
yfinance: 0.2.40

[gustavph]

Same issue - worked last week

OS: Windows 11
Region: Brazil
Python: 3.12
yfinance: 0.2.40

[jrkong]

The issue ties back to the crumb. It's likely Yahoo changed something with their cookies or how they expect to receive the crumb.

[fpsy]

I had the same issue yesterday, but now it works again.

[justmessingaround]

its randomly back working for me too