{"id":"CVE-2026-116870","title":"In affected versions of Octopus Server, OIDC token issuer validation was performed inconsistently","summary":"In affected versions of Octopus Server, OIDC token issuer validation was performed inconsistently. This could result in a token issued from a suitably configured non legitimate issuer being accepted as a token belonging to a service acco…","severity":"high","cvss":8.7,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-1289"],"vendor":"Octopus Deploy","product":"Octopus Server","affected":["octopus_server >= 2024.1.0 < 2026.1.11781","octopus_server >= 2026.2.0 < 2026.2.13438","octopus_server >= 2026.3.0 < 2026.3.15816"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T10:28:11.007Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116870","references":[{"url":"https://advisories.octopus.com/post/2026/sa2026-15"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T16:11:59.296Z","slug":"CVE-2026-116870","body":"## Overview\n\nIn affected versions of Octopus Server, OIDC token issuer validation was performed inconsistently. This could result in a token issued from a suitably configured non legitimate issuer being accepted as a token belonging to a service account from a legitimate trusted issuer. Exploitation requires a service account with at least one OIDC identity configured. An attacker would also need to know or guess some details of that identity in order to be in a position to attempt exploitation.\n\n## Affected\n\n- `octopus_server >= 2024.1.0 < 2026.1.11781`\n- `octopus_server >= 2026.2.0 < 2026.2.13438`\n- `octopus_server >= 2026.3.0 < 2026.3.15816`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}