Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible API with low complexity and no UI; PR:L reflects a required pre-existing scoped account (description's 'highly privileged user' could justify PR:H), with high C/I/A over unauthorized deployments.
Primary rating from Vendor (Octopus).
CVSS VectorVendor: Octopus
Lifecycle Timeline
3DescriptionCVE.org
In affected versions, Octopus Server incorrectly evaluates multiple scoped permission assignments, allowing a highly privileged user to obtain deployment permissions beyond those actually granted to them.
AnalysisAI
Incorrect authorization in Octopus Server causes the platform to evaluate multiple scoped permission assignments incorrectly, so an already-authenticated, highly privileged user can accumulate deployment permissions beyond those actually granted to them. This is an authenticated (PR:L) network-reachable flaw requiring a valid Octopus account that already holds scoped permission assignments; the realistic threat actor is a malicious insider or an attacker using a compromised legitimate account rather than an anonymous internet attacker, and no victim interaction is needed. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a valid, already-authenticated Octopus Server account that holds scoped permission assignments; the flaw manifests specifically when a user has MULTIPLE scoped permission assignments that the server evaluates incorrectly, over-granting deployment rights. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a CWE-863 incorrect-authorization flaw in Octopus Server that lets an already-authenticated, privileged user accumulate deployment permissions beyond those actually granted. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version is identified in the supplied data; the referenced vendor advisory https://advisories.octopus.com/post/2026/sa2026-12 (Octopus SA2026-12) is the authoritative source for the affected build range and the corrected Octopus Server version, so upgrade to the exact version stated there as the primary fix and re-verify afterwards. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Octopus Server instances and record their versions, restrict administrative and deployment permissions to only essential personnel, and enable detailed audit logging for permission changes and deployment activity. …
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More in Octopus Server
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Server-level configuration changes can be made by any authenticated low-privilege user in Octopus Server through a speci
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In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes. Rated critical
In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the target do not have sensitive va
Path traversal in Octopus Deploy allows removing files and file contents on the host through API manipulation. Enables d
In affected versions of Octopus Server it is possible for a session token to be valid indefinitely due to improper valid
Path traversal in Octopus Server allows an authenticated low-privilege user to overwrite arbitrary files on the server f
Authenticated remote code execution in Octopus Server allows any user whose role grants permission to edit an Environmen
Privilege escalation in Octopus Server lets an authenticated user who already holds permission to modify roles weaken a
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-94659
GHSA-w6j2-5q9c-xv6x