{"id":"CVE-2026-103902","aliases":["EUVD-2026-97323","GHSA-jjqw-f3cg-gjjw","UBUNTU-CVE-2026-103902"],"status":"published","title":"DigiDoc improper signature verification","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures\n that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00147,"percentile":0.03976,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2026-10-12T10:25:20Z","modified":"2026-10-24T07:22:37Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libdigidocpp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.3.0-0ubuntu9","0.3.0-0ubuntu10","0.3.0-0ubuntu11"]}],"products":[{"vendor":"digidoc","product":"digidoc android"},{"vendor":"digidoc","product":"digidoc ios"},{"vendor":"digidoc","product":"digidoc4"},{"vendor":"digidoc","product":"libdigidocpp"},{"vendor":"estonian information system authority (ria)","product":"digidoc4"},{"vendor":"estonian information system authority (ria)","product":"libdigidocpp"}],"references":[{"url":"https://github.com/open-eid/libdigidocpp/pull/735","tags":["patch","fix","report"]},{"url":"https://www.id.ee/en/article/id-tarkvara-uus-versioon-267-on-avalikustatud/","tags":["government-resource","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103902"},{"url":"https://www.id.ee/en/article/id-tarkvara-uus-versioon-267-on-avalikustatud"},{"url":"https://github.com/advisories/GHSA-jjqw-f3cg-gjjw"},{"url":"https://ubuntu.com/security/CVE-2026-103902","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103902","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-103902","title":"DigiDoc improper signature verification","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures\n that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","status":"published","published":"2026-10-12T10:25:20.361Z","modified":"2026-10-15T18:07:17.219Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T13:34:37.420074Z"}],"euvd":[{"id":"EUVD-2026-97323","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures\n that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","status":"published","published":"2026-10-12T10:25:20Z","modified":"2026-10-15T18:07:17Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T17:00:11.403253Z"}],"ghsa":[{"id":"GHSA-jjqw-f3cg-gjjw","title":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc...","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures\n that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","status":"published","published":"2026-10-12T12:30:27Z","modified":"2026-10-12T12:30:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:13:05.860723Z"}],"nvd":[{"id":"CVE-2026-103902","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures\n that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","status":"published","published":"2026-10-12T11:17:08.617Z","modified":"2026-10-16T20:04:29.76Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:12:56.310333Z"}],"osv":[{"id":"CVE-2026-103902","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures\n that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","status":"published","published":"2026-10-12T11:17:08.617Z","modified":"2026-10-24T07:22:37.242431608Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:54.236592Z"},{"id":"UBUNTU-CVE-2026-103902","description":"Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures  that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.","status":"published","published":"2026-10-12T11:17:00Z","modified":"2026-10-17T12:57:58.452270703Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}