Fortinet's SSO Bypass Just Got Caught Slipping and Bestie I Am NOT Okay 😤🐑

Okay so I was literally mid-sip of my matcha when this dropped and I had to put it DOWN because the audacity??? The absolute nerve???

Some crusty wolf found a hole in the fence inside FortiOS's SSO authentication and has been ACTIVELY waltzing through it like they own the whole pasture. CVE-2026-24858, now proudly listed on CISA's Known Exploited Vulnerabilities catalog because apparently we're doing THIS today. No cap, the timeline on this one is giving "we knew and said nothing" energy and I simply cannot.

Here's the cringe breakdown: the flaw lets attackers bypass authentication entirely. Like, no password, no handshake, no nothing. You just. Walk in. The flock is just vibing in there, completely unaware, and the wolf strolled past the electric fence like it was a decorative garden feature. Embarrassing for everyone involved, honestly.

The Shepherds in your org who approved "we'll patch it next quarter" as a strategy? Yeah. This is why we don't do that. This is the consequence. I hope the board meeting was fun bestie. 💀

CISA adding this to KEV means active exploitation is confirmed in the wild, which is the threat intel equivalent of your situationship texting you at 2am. A red flag. A very loud, very obvious red flag.

The Sky Pasture deployments running FortiOS SSO? Extra stressed right now and I feel that spiritually. If your organization is cloud-adjacent on this one, please, I am begging you with my whole chest, check your logs for anything weird.

The cringe factor here is genuinely a 10/10. An authentication bypass in 2026 is giving "we never learned anything" and I am choosing to be upset about it publicly.

🌿 Remediation Vibes (Do These NOW, No Cap)

Apply the Fortinet ointment immediately. Like right now. Close this tab and go shear your FortiOS instances up to the fixed version Fortinet dropped. No more excuses, no more "we'll schedule a maintenance window in March."

Audit your SSO logs. Look for authentication events that feel off. Logins with no corresponding credential activity are a massive ick.

Check CISA KEV regularly. It is free. It is updated. There is zero reason your Shepherds should be surprised by anything on that list.

Run your flock through the Sheep Tunnel for any remote access while you sort this out. Reduce that attack surface, bestie.

Segment, segment, segment. If a wolf gets through one hole in the fence, they should not have access to the entire pasture. That is just basic hygiene.

Stay sheared out there, the wolves are not taking days off 🐺✂️

Original Report: https://thehackernews.com/2026/01/fortinet-patches-cve-2026-24858-after.html