{"id":"USN-8425-1","summary":"libnginx-mod-js vulnerability","details":"It was discovered that njs did not properly handle certain client-\ncontrolled variables when processing ngx.fetch() requests. An attacker\ncould possibly use this issue to trigger a heap buffer overflow, resulting\nin arbitrary code execution or a denial of service.","modified":"2026-06-18T00:44:22.512084620Z","published":"2026-06-11T20:54:04Z","related":["UBUNTU-CVE-2026-8711"],"upstream":["UBUNTU-CVE-2026-8711"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8425-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-8711"}],"affected":[{"package":{"name":"libnginx-mod-js","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/libnginx-mod-js?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.4-1ubuntu0.1~esm1"}]}],"versions":["0.9.1-1ubuntu2","0.9.1-1ubuntu3","0.9.4-1~build1","0.9.4-1","0.9.4-1build1","0.9.4-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-js","binary_version":"0.9.4-1ubuntu0.1~esm1"},{"binary_name":"libnginx-mod-stream-js","binary_version":"0.9.4-1ubuntu0.1~esm1"},{"binary_name":"njs","binary_version":"0.9.4-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8425-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-8711"}],"ecosystem":"Ubuntu:Pro:26.04:LTS"}}}],"schema_version":"1.7.5"}