CVE-2026-90448 Missing Authorization in Malcolm
Authenticated users in read-only deployments can overwrite stored records via unrestricted API routes, compromising data integrity in Malcolm network monitoring systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90448?
CVE-2026-90448 is a high-severity missing authorization vulnerability in CISA Malcolm, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A deployment mode intended to expose only read access to stored data proxies a set of application programming interface routes without restricting which request methods are allowed. One such route accepts a request that creates or overwrites a stored record, including an attacker-chosen identifier, using the application's own elevated backend credentials. This allows an authenticated user on a deployment intended to be read-only to forge or overwrite stored records that should not be modifiable in that deployment mode.
Weakness: CWE-862
Which versions are affected by CVE-2026-90448?
How do I fix CVE-2026-90448?
No fix has been published for CVE-2026-90448 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-2026-90448 being exploited?
There is no known exploitation of CVE-2026-90448 in the wild and no public exploit code.
Sources
Also known as GHSA-4chm-hjh8-jh3r.