CVE-2026-12887 - Vulnerability Details - OpenCVE

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.

Published: 2026-10-27

Score: 5.1 Medium

EPSS: n/a

KEV: No

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

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.

No data available yet.

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

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.

References

Link	Providers
https://advisories.octopus.com/post/2026/sa2026-14/

History

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		https://advisories.octopus.com/post/2026/sa2026-14/
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'}`

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: Octopus

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

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

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

Link: CVE-2026-12887

Vulnrichment

No data.

NVD

Status : Received

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

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

Link: CVE-2026-12887

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

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