CVE-2026-101169 - 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

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HIGH

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

Published Sep 29, 2026

8.7

HIGH

CVSS 4.0

EPSS 0.33%

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.

Affected products

Vendor Octopus Deploy Product Octopus Server Default
unaffected
- Version
  2019.4.1
  Status
  affected
  Constraints
  <2026.1.11781
- Version
  2026.2.0
  Status
  affected
  Constraints
  <2026.2.13441
- Version
  2026.3.0
  Status
  affected
  Constraints
  <2026.3.15829