EUVD-2026-80225
GHSA-7f5m-mqg8-7jjg
Severity by source
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
Network-accessible, low-complexity path traversal requiring low privileges (feed modify permission); no scope change; all three CIA impacts high due to arbitrary file write and conditional RCE.
Primary rating from Vendor (Octopus).
CVSS VectorVendor: Octopus
Lifecycle Timeline
3DescriptionCVE.org
In affected versions of Octopus Server, a user with permission to modify non built-in external feeds could exploit a path traversal flaw to overwrite arbitrary files on the server, which in some configurations could lead to remote code execution.
AnalysisAI
Path traversal in Octopus Server allows an authenticated low-privilege user to overwrite arbitrary files on the server filesystem, which in certain configurations escalates to remote code execution. Affected are three distinct release trains of Octopus Server (CPE: cpe:2.3:a:octopus_deploy:octopus_server). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid Octopus Server account that has been granted the specific permission to modify non built-in external feeds - this is not a default permission held by all authenticated users, so the attack surface is limited to users or roles that have been explicitly delegated this capability. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N, score 8.7) accurately reflects the core risk: network-accessible exploitation requiring only low privileges (a user account with external feed modification rights), no user interaction, and high impact across all three CIA pillars on the vulnerable system. … 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 | Upgrade to the fixed versions released by Octopus Deploy: 2026.2.13344 or later for the 2026.2 train, 2026.1.11725 or later for the 2026.1 train, and 2026.3.11816 or later for the 2026.3 train. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Octopus Server instances in use and confirm their version against the three affected release trains. …
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Same weakness CWE-22 – Path Traversal
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External POC / Exploit Code
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