{"id":"CVE-2020-16156","aliases":["ALSA-2025:8432","BELL-CVE-2020-16156","CLSA-2022-1668032518","CLSA-2022-1668118081","CLSA-2022-1668120434","CLSA-2022-1668122645","CLSA-2022-1668467714","CLSA-2025-1750165585","CLSA-2025-1758821935","CLSA-2025-1758822139","CLSA-2025-1758822697","DEBIAN-CVE-2020-16156","DLA-3926-1","EUVD-2020-8122","GHSA-mx9v-6qg3-92rp","MGASA-2022-0018","RHSA-2025:8432","RLSA-2025:8432","UBUNTU-CVE-2020-16156","USN-5689-1"],"status":"published","title":"CPAN 2.28 allows Signature Verification Bypass.","description":"CPAN 2.28 allows Signature Verification Bypass.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00858,"percentile":0.58763,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-347"],"published":"2021-12-13T17:03:00Z","modified":"2026-10-29T11:02:23Z","fixes":[{"ecosystem":"AlmaLinux:8","package":"perl-CPAN","fixed_in":["2.18-402.el8_10"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl","fixed_in":["4:5.10.1-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Archive-Extract","fixed_in":["1:0.38-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Archive-Tar","fixed_in":["1.58-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-CGI","fixed_in":["3.51-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-CPAN","fixed_in":["1.9402-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-CPANPLUS","fixed_in":["0.88-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Compress-Raw-Bzip2","fixed_in":["2.021-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Compress-Raw-Zlib","fixed_in":["1:2.021-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Compress-Zlib","fixed_in":["2.021-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Digest-SHA","fixed_in":["1:5.47-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-ExtUtils-CBuilder","fixed_in":["1:0.27-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-ExtUtils-Embed","fixed_in":["1.28-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-ExtUtils-MakeMaker","fixed_in":["6.55-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-ExtUtils-ParseXS","fixed_in":["1:2.2003.0-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-File-Fetch","fixed_in":["0.26-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-IO-Compress-Base","fixed_in":["2.021-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-IO-Compress-Bzip2","fixed_in":["2.021-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-IO-Compress-Zlib","fixed_in":["2.021-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-IO-Zlib","fixed_in":["1:1.09-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-IPC-Cmd","fixed_in":["1:0.56-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Locale-Maketext-Simple","fixed_in":["1:0.18-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Log-Message","fixed_in":["1:0.02-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Log-Message-Simple","fixed_in":["0.04-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Module-Build","fixed_in":["1:0.3500-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Module-CoreList","fixed_in":["2.18-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Module-Load","fixed_in":["1:0.16-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Module-Load-Conditional","fixed_in":["0.30-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Module-Loaded","fixed_in":["1:0.02-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Module-Pluggable","fixed_in":["1:3.90-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Object-Accessor","fixed_in":["1:0.34-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Package-Constants","fixed_in":["1:0.02-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Params-Check","fixed_in":["1:0.26-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Parse-CPAN-Meta","fixed_in":["1:1.40-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Pod-Escapes","fixed_in":["1:1.04-146.el6.tuxcare.els4"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"perl-Pod-S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bypass","status":"published","published":"2025-06-17T13:53:46Z","modified":"2026-06-01T00:32:58.755129582Z","updated_at":"2026-11-02T15:43:41.66212Z"},{"id":"CLSA-2025-1758821935","title":"perl-CPAN: Fix of 2 CVEs","description":"- CVE-2023-31484: verify TLS certificates when downloading distributions over\n  HTTPS\n- CVE-2020-16156: fix Signature Verification Bypass","status":"published","published":"2025-09-25T17:38:59Z","modified":"2026-10-21T10:48:05.993118415Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"CLSA-2025-1758822139","title":"perl-CPAN: Fix of CVE-2020-16156","description":"- CVE-2020-16156: fix Signature Verification Bypass","status":"published","published":"2025-09-25T17:42:26Z","modified":"2026-06-01T00:33:00.099113586Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"CLSA-2025-1758822697","title":"perl-CPAN: Fix of 2 CVEs","description":"- CVE-2023-31484: verify TLS certificates when downloading distributions over\n  HTTPS\n- CVE-2020-16156: fix Signature Verification Bypass","status":"published","published":"2025-09-25T17:51:43Z","modified":"2026-10-21T10:48:16.409383258Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"DLA-3926-1","title":"perl - security update","status":"published","published":"2024-10-21T00:00:00Z","modified":"2026-03-09T01:20:46.118633Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"MGASA-2022-0018","title":"Updated perl-CPAN packages fix security vulnerability","description":"CPAN 2.28 allows Signature Verification Bypass. (CVE-2020-16156)\n","status":"published","published":"2022-01-15T08:09:56Z","modified":"2026-04-16T04:43:40.225945574Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"USN-5689-1","title":"perl vulnerability","description":"It was discovered that Perl incorrectly handled certain signature verification.\nAn remote attacker could possibly use this issue to bypass signature verification.\n","status":"published","published":"2022-10-19T11:10:27Z","modified":"2026-06-29T13:49:42.335135755Z","updated_at":"2026-11-02T16:58:16.20937Z"}]}}