{"id":"CVE-2026-102478","state":"PUBLISHED","title":"In affected versions of Octopus Server, an authenticated user with permission to modify roles could bypass the protections preventing access abuse resulting in privilege escalation","description":"In affected versions of Octopus Server, an authenticated user with permission to modify roles could bypass the protections preventing access abuse resulting in privilege escalation. It was possible for the built-in role to be weakened and the attacker's account added to a privileged team. This was achievable due to improper validation of unsafe equivalence in inputs.","publishedAt":"2026-10-07T01:17:54.724Z","updatedAt":"2026-10-07T18:40:25.736Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"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","source":"Octopus"},"assigner":"Octopus","products":["Octopus Deploy Octopus Server"],"affected":[{"vendor":"Octopus Deploy","product":"Octopus Server","defaultStatus":"unaffected","versions":[{"version":"2023.2.945","status":"affected","lessThan":"2026.1.11768","versionType":"custom"},{"version":"2026.2.0","status":"affected","lessThan":"2026.2.13408","versionType":"custom"},{"version":"2026.3.0","status":"affected","lessThan":"2026.3.15816","versionType":"custom"}],"platforms":["Windows","Linux"]}],"references":["https://advisories.octopus.com/post/2026/sa2026-11"],"weaknesses":["CWE-1289"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102478.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102478","state":"PUBLISHED","datePublished":"2026-10-07T01:17:54.724Z","dateUpdated":"2026-10-07T18:40:25.736Z","assignerShortName":"Octopus","assignerOrgId":"6f4f8c89-ef06-4bae-a2a5-6734ddf76272","dateReserved":"2026-09-29T08:53:05.496Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In affected versions of Octopus Server, an authenticated user with permission to modify roles could bypass the protections preventing access abuse resulting in privilege escalation. It was possible for the built-in role to be weakened and the attacker's account added to a privileged team. This was achievable due to improper validation of unsafe equivalence in inputs."}],"affected":[{"vendor":"Octopus Deploy","product":"Octopus Server","defaultStatus":"unaffected","versions":[{"version":"2023.2.945","status":"affected","lessThan":"2026.1.11768","versionType":"custom"},{"version":"2026.2.0","status":"affected","lessThan":"2026.2.13408","versionType":"custom"},{"version":"2026.3.0","status":"affected","lessThan":"2026.3.15816","versionType":"custom"}],"platforms":["Windows","Linux"]}],"references":[{"url":"https://advisories.octopus.com/post/2026/sa2026-11"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1289","lang":"en","description":"CWE-1289: Improper Validation of Unsafe Equivalence in Input","type":"CWE"}]}],"providerMetadata":{"shortName":"Octopus","orgId":"6f4f8c89-ef06-4bae-a2a5-6734ddf76272","dateUpdated":"2026-10-07T01:17:54.724Z"},"credits":[{"lang":"en","value":"This vulnerability was found by Nathan Willoughby","type":"finder"}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-07T18:40:08.538496Z","id":"CVE-2026-102478","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-07T18:40:25.736Z"}}]}}}