In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent directory.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Octopus Deploy Octopus Server unaffected
Version Status Constraints
2023.0.0 affected < 2026.1.674
2026.1 affected < 2026.1.674
2026.2 affected < 2026.2.973
2026.3 affected < 2026.3.5839

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://advisories.octopus.com/post/2026/sa2026-14/ cve-icon cve-icon
History

Tue, 27 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Title Out-of-Directory Script Execution via Malicious NuGet Packages on Octopus Server
Weaknesses CWE-22
CWE-264

Tue, 27 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
Description In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent directory.
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Octopus

Published:

Updated: 2026-10-27T13:15:22.608Z

Reserved: 2026-06-22T10:55:01.254Z

Link: CVE-2026-12887

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-27T14:17:00.590

Modified: 2026-10-27T15:08:50.630

Link: CVE-2026-12887

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T14:45:03Z

Weaknesses