{"id":"CVE-2026-84790","aliases":["DEBIAN-CVE-2026-84790","EUVD-2026-100750","GHSA-6f9v-9427-9fpm","UBUNTU-CVE-2026-84790","USN-8953-1"],"status":"published","title":"OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a...","description":"OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field","severity":{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00146,"percentile":0.03914,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-158","CWE-290"],"published":"2026-10-13T21:39:05Z","modified":"2026-10-23T17:47:28Z","fixes":[{"ecosystem":"Debian:14","package":"openvpn","fixed_in":["2.7.8-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"openvpn","fixed_in":["2.5.11-0ubuntu0.22.04.6"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"openvpn","fixed_in":["2.6.19-0ubuntu0.24.04.5"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.10","package":"openvpn","fixed_in":["2.7.7-1ubuntu1.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"openvpn","fixed_in":["2.7.0-1ubuntu1.4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.11-1","2.6.12-1","2.6.13-1","2.6.14-0+deb12u1","2.6.14-0+deb12u2","2.6.14-1","2.6.14-2","2.6.15-1","2.6.3-1","2.6.3-1+deb12u1","2.6.3-1+deb12u1~bpo11+1","2.6.3-1+deb12u2","2.6.3-1+deb12u2~bpo11+1","2.6.3-1+deb12u3","2.6.3-1+deb12u4","2.6.3-2","2.6.3-2.1","2.6.7-1","2.6.9-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.14-1","2.6.14-1+deb13u1","2.6.14-1+deb13u2","2.6.14-1+deb13u3","2.6.14-2","2.6.15-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.8-1"}]}],"versions":["2.6.14-1","2.6.14-2","2.6.15-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-4ubuntu1","2.3.2-5ubuntu1","2.3.2-7ubuntu1","2.3.2-7ubuntu2","2.3.2-7ubuntu3","2.3.2-7ubuntu3.1","2.3.2-7ubuntu3.2","2.3.2-7ubuntu3.2+esm1","2.3.2-7ubuntu3.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.7-1ubuntu1","2.3.7-2ubuntu1","2.3.8-1ubuntu1","2.3.10-1ubuntu1","2.3.10-1ubuntu2","2.3.10-1ubuntu2.1","2.3.10-1ubuntu2.2","2.3.10-1ubuntu2.2+esm1","2.3.10-1ubuntu2.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3-4ubuntu1","2.4.4-1ubuntu1","2.4.4-2ubuntu1","2.4.4-2ubuntu1.1","2.4.4-2ubuntu1.2","2.4.4-2ubuntu1.3","2.4.4-2ubuntu1.5","2.4.4-2ubuntu1.6","2.4.4-2ubuntu1.7","2.4.4-2ubuntu1.7+esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.7-1ubuntu2","2.4.7-1ubuntu2.20.04.2","2.4.7-1ubuntu2.20.04.3","2.4.7-1ubuntu2.20.04.4","2.4.12-0ubuntu0.20.04.1","2.4.12-0ubuntu0.20.04.2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.11-0ubuntu0.22.04.6"}]}],"versions":["2.5.1-3ubuntu1","2.5.1-3ubuntu2","2.5.1-3ubuntu4","2.5.1-3ubuntu5","2.5.5-1ubuntu1","2.5.5-1ubuntu3","2.5.5-1ubuntu3.1","2.5.9-0ubuntu0.22.04.2","2.5.9-0ubuntu0.22.04.3","2.5.11-0ubuntu0.22.04.1","2.5.11-0ubuntu0.22.04.3","2.5.11-0ubuntu0.22.04.4","2.5.11-0ubuntu0.22.04.5"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.19-0ubuntu0.24.04.5"}]}],"versions":["2.6.5-0ubuntu1","2.6.7-1ubuntu1","2.6.9-1ubuntu2","2.6.9-1ubuntu3","2.6.9-1ubuntu4","2.6.9-1ubuntu4.1","2.6.12-0ubuntu0.24.04.1","2.6.12-0ubuntu0.24.04.3","2.6.14-0ubuntu0.24.04.1"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impersonate others via a...","description":"OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field","status":"published","published":"2026-10-14T00:31:47Z","modified":"2026-10-14T00:31:55Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-158"],"updated_at":"2026-11-02T15:13:22.12395Z"}],"nvd":[{"id":"CVE-2026-84790","description":"OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject 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field","status":"published","published":"2026-10-13T22:18:58.937Z","modified":"2026-10-23T17:47:28.728001717Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:46:05.022702Z"},{"id":"UBUNTU-CVE-2026-84790","description":"OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field","status":"published","published":"2026-10-13T22:18:00Z","modified":"2026-10-22T23:20:53.046742381Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"USN-8953-1","title":"openvpn vulnerability","description":"It was discovered that OpenVPN incorrectly handled certificate subject\nfields. A remote authenticated user could possibly use this issue to\nimpersonate other users.","status":"published","published":"2026-10-22T15:38:41Z","modified":"2026-10-22T23:28:04.731653736Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}