{"id":"USN-8087-1","summary":"python-cryptography vulnerability","details":"It was discovered that python-cryptography incorrectly handled subgroup\nvalidation for SECT curves. A remote attacker could use this issue to\nperform a subgroup attack and possibly recover the least significant bits\nof private keys.","modified":"2026-04-27T18:41:18.471610Z","published":"2026-03-12T14:16:11Z","related":["UBUNTU-CVE-2026-26007"],"upstream":["CVE-2026-26007","UBUNTU-CVE-2026-26007"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8087-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-26007"}],"affected":[{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@3.4.8-1ubuntu2.3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.8-1ubuntu2.3"}]}],"versions":["3.3.2-1","3.3.2-1build1","3.4.8-1","3.4.8-1ubuntu1","3.4.8-1ubuntu2","3.4.8-1ubuntu2.1","3.4.8-1ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-cryptography","binary_version":"3.4.8-1ubuntu2.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8087-1.json","cves_map":{"cves":[{"id":"CVE-2026-26007","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@41.0.7-4ubuntu0.3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"41.0.7-4ubuntu0.3"}]}],"versions":["38.0.4-4","38.0.4-4ubuntu1","41.0.7-3","41.0.7-4build2","41.0.7-4build3","41.0.7-4ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-cryptography","binary_version":"41.0.7-4ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8087-1.json","cves_map":{"cves":[{"id":"CVE-2026-26007","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:24.04:LTS"}}},{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/python-cryptography@43.0.0-1ubuntu1.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"43.0.0-1ubuntu1.1"}]}],"versions":["43.0.0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-cryptography","binary_version":"43.0.0-1ubuntu1.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8087-1.json","cves_map":{"cves":[{"id":"CVE-2026-26007","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:25.10"}}}],"schema_version":"1.7.5"}