CVE-2026-12887
Summary
| CVE | CVE-2026-12887 |
|---|---|
| State | PUBLISHED |
| Assigner | Octopus |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-27 14:17:00 UTC |
| Updated | 2026-11-04 18:17:43 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 5.1 MEDIUM from [email protected]
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/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
EPSS: 0.002420000 probability, percentile 0.154550000 (date 2026-11-04)
Problem Types: CWE-22 | Path Traversal in Octopus Server | CWE-22 CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 5.1 | MEDIUM | 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/E:X/C... |
| 4.0 | CNA | CVSS | 5.1 | MEDIUM | 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 |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
HighUser Interaction
NoneConfidentiality
NoneIntegrity
LowAvailability
LowSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/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
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Octopus Deploy | Octopus Server | affected 2023.0.0 2026.1.674 custom | Windows, Linux |
| CNA | Octopus Deploy | Octopus Server | affected 2026.1 2026.1.674 custom | Windows, Linux |
| CNA | Octopus Deploy | Octopus Server | affected 2026.2 2026.2.973 custom | Windows, Linux |
| CNA | Octopus Deploy | Octopus Server | affected 2026.3 2026.3.5839 custom | Windows, Linux |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| advisories.octopus.com/post/2026/sa2026-14 | [email protected] | advisories.octopus.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: This vulnerability was found by siddharthkathole62bb60 (en)
There are currently no legacy QID mappings associated with this CVE.