{"id":"CVE-2026-5082","summary":"Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id","details":"Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id.\n\nThe generate_session_id function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes using SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time.  The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\n\nAmon2::Plugin::Web::CSRFDefender versions before 7.00 were part of Amon2, which was vulnerable to insecure session ids due to CVE-2025-15604.\n\nNote that the author has deprecated this module.","modified":"2026-07-27T03:56:41.193511977Z","published":"2026-04-08T05:48:43.633Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5082.json","cna_assigner":"CPANSec","cwe_ids":["CWE-338","CWE-340"]},"references":[{"type":"WEB","url":"https://cpan.org/modules"},{"type":"WEB","url":"https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.03/source/lib/Amon2/Plugin/Web/CSRFDefender/Random.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5082.json"},{"type":"ADVISORY","url":"https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.04/changes"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5082"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2025-15604"},{"type":"PACKAGE","url":"https://github.com/tokuhirom/Amon2-Plugin-Web-CSRFDefender"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tokuhirom/amon2-plugin-web-csrfdefender","events":[{"introduced":"f52bc5567d5f863a89be8bef18fcaa42ed33a803"},{"last_affected":"de2fe66c42b3ec8f4e202a449e22fa24d6049bd4"}],"database_specific":{"extracted_events":[{"introduced":"7.00"},{"last_affected":"7.03"}],"source":"AFFECTED_FIELD"}}],"versions":["7.03","7.02","7.01","7.00"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5082.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}