Yahoo!

Disclosed Jul 12, 2012453,427 affectedUnverified

SQL injection on Yahoo Voices leaks about 450,000 plaintext passwords

Yahoo confirmed it was investigating a breach that exposed about 450,000 user IDs and plain text passwords taken from servers tied to its Yahoo Voices publishing service.

What is known

People affected	453,427 (as reported by the organization)
Disclosed	Jul 12, 2012
Happened	Jul 11, 2012
Attack	Hacking
Data exposed	EmailsPasswords
Sector	Tech · US
Status	Unverified: not yet confirmed by an official notice, a filing or the organization
Check your email	Have I Been Pwned

Sources

Aggregatorhaveibeenpwned.com

Have I Been Pwned: Yahoo

Newsbbc.co.uk

Yahoo investigating exposure of 400,000 passwords

Notices filed

TotalJul 12, 2012

Research453,427 people

Accounts in the dataDec 4, 2013

Have I Been Pwned453,427 people

Other breaches at Yahoo!

2014 Yahoo breach hit 515,000 UK accounts; ICO fine of GBP 250,000Hacking exposed names, emails, phone numbers, dates of birth, passwords and addresses. Reported to the California AG.Hacking515K affectedTechUSSep 22, 2016

History of this record

source_type2026-09-25

aggregator to pressby seedSource

source_url2026-09-25

https://haveibeenpwned.com/Breach/Yahoo to https://www.bbc.co.uk/news/technology-18811300by seedSource

attack2026-09-25

unknown to hackingby seedSource

records_basis2026-09-25

hibp to organizationby seedSource

disclosed2026-09-25

2013-12-04 to 2012-07-12by seedSource

summary2026-09-25

In July 2012, Yahoo! had their online publishing service "Voices" compromised via a SQL injection attack. The breach resulted in the disclosure of nearly half a million usernames and passwords stored in plain text. The breach showed that of to Yahoo confirmed it was investigating a breach that exposed about 450,000 user IDs and plain text passwords taken from servers tied to its Yahoo Voices publishing service.by seedSource

title2026-09-25

empty to SQL injection on Yahoo Voices leaks about 450,000 plaintext passwordsby seedSource

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (Have I Been Pwned). Record counts are as reported. Not legal advice.

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