LDAP Identity Editing Flaw in Octopus Server by Octopus Deploy
CVE-2026-124628

8.7HIGH

Key Information:

Vendor

Octopus Deploy

Status
Octopus Server
Vendor
CVE Published:
12 November 2026

What is CVE-2026-124628?

In specific versions of Octopus Server, the system fails to properly validate user changes to their LDAP identities. This flaw allows users to modify their own LDAP identity even when the Administrator has disabled the self-service editing feature. As a consequence, users may gain access to teams associated with external LDAP groups that they are not a part of, potentially leading to escalated privileges and unauthorized access to sensitive administrative functions.

Affected Version(s)

Octopus Server Windows 2018.3.0 < 2026.2.13526

Octopus Server Windows 2026.3.0 < 2026.3.15936

References

https://advisories.octopus.com/post/2026/sa2026-24

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
.