CVE-2026-101169 PUBLISHED

Assigner: Octopus
Reserved: 28.09.2026 Published: 29.09.2026 Updated: 29.09.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Octopus Deploy
Product	Octopus Server
Versions	Default: unaffected affected from 2019.4.1 to 2026.1.11781 (excl.) affected from 2026.2.0 to 2026.2.13441 (excl.) affected from 2026.3.0 to 2026.3.15829 (excl.)

Credits

This vulnerability was found by Nathan Willoughby finder

References

https://advisories.octopus.com/post/2026/sa2026-10

Problem Types

CWE-502: Deserialization of Untrusted Data CWE