FortiOS/FortiSASE: authentication bypass

FortiOS, FortiSASE

An unauthenticated attacker can broadcast LSA via specially crafted requests.

Do this now

Check the vendor advisory for a fix to FortiOS and FortiSASE and restrict untrusted network access meanwhile.

Who should check: teams running VPN & firewalls

First seen: 10 Nov 2026
Last update: 10 Nov 2026, 20:20 UTC
Source: news
On the menu as: VPN & firewalls

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## FortiOS/FortiSASE: authentication bypass
Severity: unknown. Patch status: fix status unknown.
Affected: FortiOS, FortiSASE

An unauthenticated attacker can broadcast LSA via specially crafted requests.

## Steps
1. This touches infrastructure (vpn-edge). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://fortiguard.fortinet.com/psirt/FG-IR-26-267
https://pwned.coffee/i/fortios-fortisase-authentication-bypass

Receipt

Exploitation: No known exploitation
Score: No CVSS published yet: severity unknown.
Last checked: 13 Nov 2026, 16:26 UTC

Sources: KEV – CVE record – Vendor –

Sources

filestore.fortinet.com: Authentication bypass by primary weakness

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