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Tech & Science 22 Oct 2026

Browsers block eMudhra certificates after security flaw

Level 1 · Summary From Explained | The Indian Express, mint - technology

Google, Mozilla, Apple and Microsoft blocked eight digital certificates issued by Bengaluru-based eMudhra after researchers found dangerously weak private keys, according to The Indian Express. The flaw could have let attackers impersonate legitimate websites and intercept secure communications. Google pushed an emergency Chrome update and Mozilla used its certificate revocation system in Firefox, without users needing to update. The incident raises questions about safeguards at organisations that certify websites.

Who it affects, and how

  • Website owners using eMudhra certificates browsers may warn visitors their connection is not secure until certificates are replaced
  • Online users the flaw could have let attackers fake trusted websites and steal data

What it means for your work

  • Engineer / tech professional: Check whether your systems rely on eMudhra certificates and review key-generation practices.
  • Banking & finance professional: Weak certificates can undermine trust in secure online banking and payments.

What it sets off

Who decided, why they say they did, and what it changes for people. Tap a card for the reasoning.

1 change, up to 1 step out · 1 bad for those affectedReachesTech & StartupsSmall business owner
2026-10-22Google blocked eight eMudhra certificates in an emergency Chrome updateWhy, in their words: researchers found dangerously weak private keys (The Indian Express)

Green edge: good for those affected; red: bad; grey: mixed. Reported and Expert view steps come from a named source; Our reasoning steps are not stated anywhere and follow through the mechanism shown, so we are less sure of them. Bars show how sure we are, and that falls with every step. How we reason

Who is in it

  • eMudhra had eight certificates blocked over weak keys
  • Google blocked certificates via emergency Chrome update
  • Mozilla blocked certificates in Firefox
  • Apple took action against affected certificates
  • Microsoft took action against affected certificates

Where this comes from

A level-1 summary of these reports, written in plain words. We have not checked it claim by claim; stories we research in full are marked level 2 to 5.

  1. [1]Explained | The Indian Express: Why Google, Mozilla, other browsers blocked eMudhra certificates over security lapse original ↗
  2. [2]mint - technology: Google, Apple and Mozilla block 8 eMudhra certificates over weak keys: What users need to know original ↗
Where this came from