John Z Black

The Lock Is Broken: Critical Auth Bypasses Hit Cisco, GitHub, and Palo Alto

John Z Black Apr 21, 2026

Vulnerabilities & Patching #cisco #github #palo-alto #auth-bypass #cisa #kev #patch-now #saml #sd-wan

Four critical authentication bypasses dropped this week across Cisco SD-WAN, GitHub Enterprise, Palo Alto PAN-OS, and Zabbix. This isn't a credential problem. The authentication systems themselves are failing.

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