CVE-2026-66665 — Type Hub
CRITICALCVE-2026-66665 is a critical-severity (CVSS 10) Unrestricted File Upload vulnerability in Brandexponents Type Hub. Versions up to 2.0.6 are affected; the records list no fixed version yet, so check the vendor advisory below.
Unauthenticated Arbitrary File Upload in Type Hub <= 2.0.6 versions.
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-66665.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Description
Unauthenticated Arbitrary File Upload in Type Hub <= 2.0.6 versions.
Affected Products
Type HubBrandexponentsDetection & mitigation playbook
Vendor / applianceDetect
Inventory every Brandexponents Type Hub deployment and check each version against the affected-products list above.
Remediation status
The records we use list no fixed version for CVE-2026-66665 (versions up to 2.0.6 are affected). Check the Brandexponents Type Hub advisory for a patched release, and apply the workarounds below until you can upgrade.
Mitigate without a patch
Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-66665 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.