{"id":"CVE-2026-100310","aliases":["DEBIAN-CVE-2026-100310","EUVD-2026-87314","GHSA-rxpm-xfjv-mq65","MGASA-2026-0484","UBUNTU-CVE-2026-100310"],"status":"published","title":"GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","severity":{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00137,"percentile":0.03135,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-426"],"published":"2026-09-25T19:38:28Z","modified":"2026-10-17T12:58:41Z","fixes":[{"ecosystem":"Debian:14","package":"libextractor","fixed_in":["1:1.17-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.11-7","1:1.11-8","1:1.13-1","1:1.13-10","1:1.13-2","1:1.13-3","1:1.13-4","1:1.13-4+loong64","1:1.13-5","1:1.13-6","1:1.13-7","1:1.13-8","1:1.13-9","1:1.17-1","1:1.19-1","1:1.19-2"]},{"source":"osv","ecosystem":"Debian:13","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.13-10","1:1.13-8","1:1.13-9","1:1.17-1","1:1.19-1","1:1.19-2"]},{"source":"osv","ecosystem":"Debian:14","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.17-1"}]}],"versions":["1:1.13-10","1:1.13-8","1:1.13-9"]},{"source":"osv","ecosystem":"Mageia:10","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16-1.mga10"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.1-1ubuntu1","1:1.2-1ubuntu1","1:1.3-1","1:1.3-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.3-2build1","1:1.3-2ubuntu1","1:1.3-3","1:1.3-4+deb9u3build0.16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.3-4build3","1:1.6-1","1:1.6-1build1","1:1.6-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.9-2","1:1.9-2ubuntu1","1:1.9-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.11-5"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.11-8","1:1.13-3","1:1.13-3build2","1:1.13-3build3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.13-9","1:1.13-10","1:1.19-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libextractor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.13-8build1","1:1.13-9"]}],"products":[{"vendor":"gnu","product":"libextractor"}],"references":[{"url":"https://github.com/Haitam-lazaar/libextractor-privesc","tags":["exploit","third-party-advisory","report"]},{"url":"https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html","tags":["patch","report"]},{"url":"https://ftp.gnu.org/gnu/libextractor/","tags":["release-notes","report"]},{"url":"https://www.gnu.org/software/libextractor/","tags":["product","report"]},{"url":"https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix","tags":["third-party-advisory","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/25/25","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100310"},{"url":"https://ftp.gnu.org/gnu/libextractor"},{"url":"https://www.gnu.org/software/libextractor"},{"url":"https://github.com/advisories/GHSA-rxpm-xfjv-mq65"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-100310","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0484.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36327","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/16/16","tags":["web"]},{"url":"https://www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2","tags":["advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/25/25","tags":["web","report"]},{"url":"https://ubuntu.com/security/CVE-2026-100310","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100310","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-100310","title":"GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","status":"published","published":"2026-09-25T19:38:28.517Z","modified":"2026-09-30T00:05:50.934Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:20:06.925367Z"}],"euvd":[{"id":"EUVD-2026-87314","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","status":"published","published":"2026-09-25T19:38:28Z","modified":"2026-09-30T00:05:50Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:50.63586Z"}],"ghsa":[{"id":"GHSA-rxpm-xfjv-mq65","title":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the...","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","status":"published","published":"2026-09-25T21:33:02Z","modified":"2026-09-26T03:30:22Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T15:12:27.845198Z"}],"nvd":[{"id":"CVE-2026-100310","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","status":"published","published":"2026-09-25T20:17:05.833Z","modified":"2026-09-30T17:31:44.573Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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","assessor":"secondary"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:12:51.721923Z"}],"osv":[{"id":"DEBIAN-CVE-2026-100310","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","status":"published","published":"2026-09-25T20:17:05.833Z","modified":"2026-10-01T08:47:42.0945294Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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":"2026-11-02T15:45:48.440897Z"},{"id":"UBUNTU-CVE-2026-100310","description":"GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.","status":"published","published":"2026-09-25T20:17:00Z","modified":"2026-10-17T12:58:41.587770767Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:55:58.519486Z"},{"id":"MGASA-2026-0484","title":"Updated libextractor package fixes security vulnerabilities","description":"GNU libextractor before 1.15 Stack Overflow via OLE2. (CVE-2026-91752)\nGNU libextractor before 1.16 Privilege Escalation via\nLIBEXTRACTOR_PREFIX. (CVE-2026-100310)\n","status":"published","published":"2026-10-12T18:47:12Z","modified":"2026-10-12T19:13:24.57236055Z","updated_at":"2026-11-02T15:49:43.795591Z"}]}}