{"id":"CVE-2026-12887","title":"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.","summary":"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.","severity":"medium","cvss":5.1,"cvssVector":"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","cvssSource":"cna","vendor":"Octopus Deploy","product":"Octopus Server","affected":["octopus_server >= 2023.0.0 < 2026.1.674","octopus_server >= 2026.1 < 2026.1.674","octopus_server >= 2026.2 < 2026.2.973","octopus_server >= 2026.3 < 2026.3.5839"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T13:15:22.608Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-12887","references":[{"url":"https://advisories.octopus.com/post/2026/sa2026-14/"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T16:11:59.343Z","slug":"CVE-2026-12887","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `octopus_server >= 2023.0.0 < 2026.1.674`\n- `octopus_server >= 2026.1 < 2026.1.674`\n- `octopus_server >= 2026.2 < 2026.2.973`\n- `octopus_server >= 2026.3 < 2026.3.5839`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":28.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}