{"id":"CVE-2026-81576","aliases":["EUVD-2026-66983","GHSA-gj9j-5pfx-gc7p"],"status":"published","title":"Improper Authentication of Session Handles","description":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0034,"percentile":0.27714,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-08-27T07:14:11Z","modified":"2026-09-01T20:56:59Z","products":[{"vendor":"wibu-systems-ag","product":"codemeter-runtime"}],"references":[{"url":"https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81576"},{"url":"https://github.com/advisories/GHSA-gj9j-5pfx-gc7p"}],"sources":{"cve":[{"id":"CVE-2026-81576","title":"Improper Authentication of Session Handles","description":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","status":"published","published":"2026-08-27T07:14:11.299Z","modified":"2026-08-27T13:13:33.594Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T13:36:29.327819Z"}],"euvd":[{"id":"EUVD-2026-66983","description":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","status":"published","published":"2026-08-27T07:14:11Z","modified":"2026-08-27T13:13:33Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T18:01:28.581047Z"}],"ghsa":[{"id":"GHSA-gj9j-5pfx-gc7p","title":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per...","description":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","status":"published","published":"2026-08-27T12:30:26Z","modified":"2026-08-27T12:30:27Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:11:02.620282Z"}],"nvd":[{"id":"CVE-2026-81576","description":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","status":"published","published":"2026-08-27T10:16:40.313Z","modified":"2026-09-01T20:56:59.203Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:12:42.035353Z"}]}}