Account Takeover And CredentialsIncident

Two factor authentication bypass via backup codes logic flaw

April 4, 2026r/bugbounty

In r/bugbounty, a detailed write up shows how backup code flows can undermine two factor authentication when implemented with logic flaws, reinforcing that recovery paths often become the weakest link.

How I bypassed 2FA through backup codes (logic flaw)
This is one of my latest reports.
It was on YesWeHack, a government website that actually cares about user security.
so here is one for beginners.
r/bugbounty
2falogic flawbug bounty

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