CVE-2026-66803 Azure Cosmos DB Remote Code Execution Vulnerability
An unauthorized attacker can execute code over the network due to improper access control in Azure Cosmos DB.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66803?
CVE-2026-66803 is a critical missing authorization vulnerability in Microsoft Azure Cosmos DB, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
Weakness: CWE-284
Which versions are affected by CVE-2026-66803?
It affects 1 product.
Products include Microsoft Azure Cosmos Db.
How do I fix CVE-2026-66803?
No fix has been published for CVE-2026-66803 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-66803 being exploited?
There is no known exploitation of CVE-2026-66803 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Azure Cosmos DB
Sources
Also known as GHSA-ww36-75qc-rhmx.