{"id":"CVE-2020-27155","aliases":["EUVD-2020-19679","GHSA-cc7m-766r-4r2f"],"status":"published","title":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint...","description":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01267,"percentile":0.6999,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-10-22T16:48:40Z","modified":"2026-06-17T03:08:52Z","products":[{"vendor":"octopus","product":"octopus_deploy"}],"references":[{"url":"https://github.com/OctopusDeploy","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/OctopusDeploy/Issues/issues/6637","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/OctopusDeploy/Issues/issues/6639","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://github.com/OctopusDeploy/Issues/issues/6640","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27155"},{"url":"https://github.com/advisories/GHSA-cc7m-766r-4r2f"}],"sources":{"cve":[{"id":"CVE-2020-27155","description":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","status":"published","published":"2020-10-22T16:48:40Z","modified":"2024-08-04T16:11:35.688Z","updated_at":"2026-11-02T14:35:53.236501Z"}],"euvd":[{"id":"EUVD-2020-19679","description":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","status":"published","published":"2020-10-22T16:48:40Z","modified":"2024-08-04T16:11:35Z","updated_at":"2026-11-03T03:07:13.515696Z"}],"ghsa":[{"id":"GHSA-cc7m-766r-4r2f","title":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint...","description":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","status":"published","published":"2022-05-24T17:31:59Z","modified":"2023-01-29T05:05:03Z","updated_at":"2026-11-02T14:45:41.669563Z"}],"nvd":[{"id":"CVE-2020-27155","description":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","status":"published","published":"2020-10-22T17:15:12.52Z","modified":"2026-06-17T03:08:52.677Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:20.704992Z"}]}}