{"id":"CVE-2021-33027","aliases":["EUVD-2021-19747","GHSA-8jh5-pc7c-26pc","UBUNTU-CVE-2021-33027"],"status":"published","title":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","description":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01289,"percentile":0.70584,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-331"],"published":"2021-07-19T11:52:00Z","modified":"2026-06-17T03:54:02Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"singularity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.30c-1"]}],"products":[{"vendor":"sylabs","product":"singularity"}],"references":[{"url":"https://medium.com/sylabs","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","report"]},{"url":"https://support.sylabs.io/a/solutions/articles/42000086439","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33027"},{"url":"https://github.com/advisories/GHSA-8jh5-pc7c-26pc"},{"url":"https://ubuntu.com/security/CVE-2021-33027","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33027","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-33027","description":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","status":"published","published":"2021-07-19T11:52:00Z","modified":"2024-08-03T23:42:19.054Z","updated_at":"2026-11-02T14:33:10.555814Z"}],"euvd":[{"id":"EUVD-2021-19747","description":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","status":"published","published":"2021-07-19T11:52:00Z","modified":"2024-08-03T23:42:19Z","updated_at":"2026-11-03T03:24:35.30045Z"}],"ghsa":[{"id":"GHSA-8jh5-pc7c-26pc","title":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","description":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","status":"published","published":"2022-05-24T19:08:24Z","modified":"2023-01-30T05:00:51Z","cwes":["CWE-331"],"updated_at":"2026-11-02T14:46:17.249643Z"}],"nvd":[{"id":"CVE-2021-33027","description":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","status":"published","published":"2021-07-19T12:15:08.177Z","modified":"2026-06-17T03:54:02.433Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-331"],"updated_at":"2026-11-02T14:06:55.747384Z"}],"osv":[{"id":"UBUNTU-CVE-2021-33027","description":"Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.","status":"published","published":"2021-07-19T12:15:00Z","modified":"2025-10-24T04:50:21Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:27.332852Z"}]}}