In affected versions of Octopus Server, insufficient validation of custom claims on OIDC accounts allowed a user with permission to edit accounts to cause Octopus Server to issue signed OIDC tokens that impersonate a different project. This could grant access to external systems, such as cloud providers or other Octopus instances, that trust that project's identity.

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Fixes

Solution

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Workaround

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History

Fri, 13 Nov 2026 06:45:00 +0000

Type Values Removed Values Added
Title Insufficient Validation of Custom Claims Allows OIDC Token Impersonation

Fri, 13 Nov 2026 01:00:00 +0000

Type Values Removed Values Added
First Time appeared Octopus
Octopus octopus Server
Vendors & Products Octopus
Octopus octopus Server

Thu, 12 Nov 2026 13:30:00 +0000

Type Values Removed Values Added
Description In affected versions of Octopus Server, insufficient validation of custom claims on OIDC accounts allowed a user with permission to edit accounts to cause Octopus Server to issue signed OIDC tokens that impersonate a different project. This could grant access to external systems, such as cloud providers or other Octopus instances, that trust that project's identity.
Weaknesses CWE-915
References
Metrics cvssV4_0

{'score': 8.7, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Octopus

Published:

Updated: 2026-11-12T13:23:53.793Z

Reserved: 2026-10-26T23:57:43.332Z

Link: CVE-2026-116835

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-12T14:17:23.630

Modified: 2026-11-12T19:02:35.830

Link: CVE-2026-116835

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-13T06:30:08Z

Weaknesses