CVE-2026-12887
Medium
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.
SeverityMedium
CVSS5.1
Exploit probability—
ProductOctopus Server
PublishedOct 27, 2026
First seenOct 27, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- Octopus Deploy Octopus Server2026.1.674, 2026.2.973, 2026.3.5839 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Octopus Deploy Octopus Server | 2023.0.0 ≤ v < 2026.1.674, 2026.1 ≤ v < 2026.1.674, 2026.2 ≤ v < 2026.2.973, 2026.3 ≤ v < 2026.3.5839 | 2026.1.674, 2026.2.973, 2026.3.5839 |
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