{"id":"USN-8777-1","summary":"bison vulnerability","details":"It was discovered that GNU Bison incorrectly handled grammar-defined\nconfiguration variables when generating HTML reports. An attacker could\npossibly use this issue to execute arbitrary code.","modified":"2026-09-18T01:12:29.231322580Z","published":"2026-09-17T11:36:01Z","related":["UBUNTU-CVE-2026-56389"],"upstream":["CVE-2026-56389","UBUNTU-CVE-2026-56389"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8777-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56389"}],"affected":[{"package":{"name":"bison","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/bison?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.8.2+dfsg-1ubuntu0.22.04.1"}]}],"versions":["2:3.7.6+dfsg-1build1","2:3.8.2+dfsg-1","2:3.8.2+dfsg-1build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2:3.8.2+dfsg-1ubuntu0.22.04.1","binary_name":"bison"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-56389","severity":[{"score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:L/SI:L/SA:L","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8777-1.json"}},{"package":{"name":"bison","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/bison?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.8.2+dfsg-1ubuntu0.24.04.1"}]}],"versions":["2:3.8.2+dfsg-1build1","2:3.8.2+dfsg-1build2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"bison","binary_version":"2:3.8.2+dfsg-1ubuntu0.24.04.1"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-56389","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:L/SI:L/SA:L"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8777-1.json"}},{"package":{"name":"bison","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/bison?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.8.2+dfsg-1ubuntu0.26.04.1"}]}],"versions":["2:3.8.2+dfsg-1build3","2:3.8.2+dfsg-1build4"],"ecosystem_specific":{"binaries":[{"binary_version":"2:3.8.2+dfsg-1ubuntu0.26.04.1","binary_name":"bison"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8777-1.json","cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-56389","severity":[{"score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:L/SI:L/SA:L","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}]}}}],"schema_version":"1.9.0"}