Breach Intelligence Report 03 Aug 2026

Your Yahoo Credentials May Be in the 934K Private Base Leak

HEROIC
HEROIC Threat Intelligence Team 03 Aug 2026
Email Addresses Plaintext Password Urls
Combolist 934K Private yahoo base high hitrate uploaded by a Telegram User
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Records Exposed 718,612
Source Type Combolist
Origin United States
Password Type plaintext

In April 2023, a telegram user uploaded a combolist file that exposed 718612 records of email/username and password credentials.

Breach Breakdown

Domain 934K Private yahoo base high hitrate uploaded by a Telegram User
Leaked Data Email Addresses,Plaintext Password,URLs
Password Types plaintext
Date Leaked 03 Aug 2026
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Private & Secure No Account Needed 3,702 scanned today
Breach Rank #N/A by affected users
Impact Score
29
sensitivity + scale + recency
Est. Financial Impact $5.2M fraud, phishing & misuse risk
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Identity Theft Risk Score

Risk Score: 8.7/10 - Critical

Data Exposure Analysis

Passwords Critical
Financial High
Personal Medium
Social High
Security Critical

Breach Timeline Analysis

March 2024 Multiple credentials exposed in recent data breach
January 2024 Password found in dark web marketplace
December 2023 Personal information leaked in major security incident

Security Recommendations

High Priority
Password Security

Critical: Change compromised passwords immediately and enable 2FA on all accounts

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Financial Protection

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