eMudhra’s Weak CA Keys Exposed, Threatening Global HTTPS Trust eMudhra’s Weak CA Keys Exposed, Threatening Global HTTPS Trust By Vaibhav Purohit on October 22, 2026 Eight intermediate certificates issued by Indian CA eMudhra were signed with private keys so weak they could be guessed in under a second, prompting browsers to revoke trust and forcing replacement of tens of thousands of certificates.