CVE-2026-101169 Deserialization in Octopus Server
Authenticated users with edit permissions can execute arbitrary code via insecure deserialization of crafted JSON in Octopus Server.
- 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-2026-101169?
CVE-2026-101169 is a high-severity unsafe deserialization vulnerability in Octopus Server, published on 29 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In affected versions of Octopus Server, an authenticated user with permissions to edit an Environment or Project can set specifically crafted JSON content for the object. Insecure deserialization of this content allows the user to execute arbitrary code in the Octopus Server process.
Weakness: CWE-502
Which versions are affected by CVE-2026-101169?
How do I fix CVE-2026-101169?
No fix has been published for CVE-2026-101169 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-101169 being exploited?
There is no known exploitation of CVE-2026-101169 in the wild and no public exploit code.
Sources
Also known as GHSA-cj2p-238w-jrf5.