Privilege Escalation Vulnerability in Octopus Server by Octopus Deploy
CVE-2026-96414

8.7HIGH

Key Information:

Vendor

Octopus Deploy

Status
Octopus Server
Vendor
CVE Published:
11 November 2026

What is CVE-2026-96414?

In vulnerable versions of Octopus Server, inadequate integrity protection of authentication cookies and flaws in user permission validation could allow a malicious user to escalate their access privileges to Administrative level, potentially enabling undue access to sensitive information and actions within the system.

Affected Version(s)

Octopus Server Windows 2022.1.3143 < 2026.2.13487

Octopus Server Windows 2026.3.0 < 2026.3.15875

References

https://advisories.octopus.com/post/2026/sa2026-19

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability was found by Nathan Willoughby
.