{"id":"CVE-2026-91778","title":"In affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts on a worker (including the Octopus Server built-in worker)","summary":"In affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts on a worker (including the Octopus Server built-in worker). Incorrect permission validation during script execution would a…","severity":"high","cvss":7.2,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-863"],"vendor":"Octopus Deploy","product":"Octopus Server","affected":["octopus_server >= 2019.0.0 < 2026.1.11725","octopus_server >= 2026.2.0 < 2026.2.13344","octopus_server >= 2026.3.0 < 2026.3.11816"],"published":"2026-09-15","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:41:10.423","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91778","references":[{"url":"https://advisories.octopus.com/post/2026/sa2026-08","label":"security@octopus.com"}],"tags":["nvd","cve.org"],"epss":0.00257,"epssPercentile":0.17686,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T14:39:41.923720Z"},"cvssSource":"cna","ingestedAt":"2026-09-15T07:33:29.279Z","slug":"CVE-2026-91778","body":"## Overview\n\nIn affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts on a worker (including the Octopus Server built-in worker). Incorrect permission validation during script execution would allow the script to execute without the user possessing the required authorisation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}