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Octopus Server CVE-2026-102488

| EUVDEUVD-2026-94659 HIGH
Incorrect Authorization (CWE-863)
2026-10-08 Octopus GHSA-w6j2-5q9c-xv6x
8.7
CVSS 4.0 · Vendor: Octopus
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Severity by source

Vendor (Octopus) PRIMARY
8.7 HIGH
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
vuln.today AI
8.8 HIGH

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.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (Octopus).

CVSS VectorVendor: Octopus

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Oct 08, 2026 - 03:01 EUVD
Analysis Generated
Oct 08, 2026 - 01:58 vuln.today
CVE Published
Oct 08, 2026 - 01:38 cve.org
HIGH 8.7

DescriptionCVE.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

Access
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Delivery
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Exploit
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Execution
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Impact
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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. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-102488 vulnerability details – vuln.today

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