CVE-2026-18265 OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability
Remote attackers can execute arbitrary code as root on OSNEXUS QuantaStor due to missing authentication in Kapacitor configuration.
- 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-2026-18265?
CVE-2026-18265 is a critical missing authorization vulnerability in OSNEXUS QuantaStor, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of OSNEXUS QuantaStor. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the configuration of Kapacitor. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-30036.
Weakness: CWE-306
Which versions are affected by CVE-2026-18265?
How do I fix CVE-2026-18265?
No fix has been published for CVE-2026-18265 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-2026-18265 being exploited?
There is no known exploitation of CVE-2026-18265 in the wild and no public exploit code.
Sources
Also known as GHSA-8p2m-xq5p-3g6w.