{"id":"CVE-2026-4881","title":"In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.","summary":"In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-862"],"vendor":"octopus","product":"octopus_server","affected":["octopus_server >= 2023.1.4189, < 2025.4.10545","octopus_server >= 2026.1.675, < 2026.1.11313"],"patched":["octopus_server 2026.1.11313"],"published":"2026-06-04","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-4881","references":[{"url":"https://advisories.octopus.com/post/2026/sa2026-04","label":"security@octopus.com"}],"tags":["nvd"],"epss":0.0021,"epssPercentile":0.11512,"ingestedAt":"2026-07-01T09:50:45.939Z","slug":"CVE-2026-4881","body":"## Overview\n\nIn affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.\n\n## Affected\n\n- `octopus_server >= 2023.1.4189, < 2025.4.10545`\n- `octopus_server >= 2026.1.675, < 2026.1.11313`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `octopus_server 2026.1.11313`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}