{"id":"CVE-2026-91752","aliases":["DEBIAN-CVE-2026-91752","EUVD-2026-78234","GHSA-vrwm-2jf2-f6fv","MGASA-2026-0484","UBUNTU-CVE-2026-91752"],"status":"published","title":"GNU libextractor before 1.15 Stack Overflow via OLE2","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0074,"percentile":0.54921,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-789"],"published":"2026-09-15T00:35:43Z","modified":"2026-10-17T13:01:17Z","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-ole2-rce","tags":["exploit","third-party-advisory","report"]},{"url":"https://git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.html","tags":["patch","report"]},{"url":"https://git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18422.html","tags":["patch","report"]},{"url":"https://www.gnu.org/software/libextractor/","tags":["product","report"]},{"url":"https://www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2","tags":["third-party-advisory","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/16/16"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91752"},{"url":"https://www.gnu.org/software/libextractor"},{"url":"https://github.com/advisories/GHSA-vrwm-2jf2-f6fv"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-91752","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.openwall.com/lists/oss-security/2026/09/25/25","tags":["web"]},{"url":"https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-91752","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-91752","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-91752","title":"GNU libextractor before 1.15 Stack Overflow via OLE2","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","status":"published","published":"2026-09-15T00:35:43.518Z","modified":"2026-09-24T14:22:22.119Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:19:53.115938Z"}],"euvd":[{"id":"EUVD-2026-78234","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","status":"published","published":"2026-09-15T00:35:43Z","modified":"2026-09-24T14:22:22Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:57.402158Z"}],"ghsa":[{"id":"GHSA-vrwm-2jf2-f6fv","title":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the...","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","status":"published","published":"2026-09-15T03:30:29Z","modified":"2026-09-17T03:34:23Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:12:03.458644Z"}],"nvd":[{"id":"CVE-2026-91752","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","status":"published","published":"2026-09-15T01:16:54.967Z","modified":"2026-09-24T21:04:40.34Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:12:47.335523Z"}],"osv":[{"id":"DEBIAN-CVE-2026-91752","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","status":"published","published":"2026-09-15T01:16:54.967Z","modified":"2026-09-25T08:47:31.221334384Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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":"2026-11-02T15:46:06.410207Z"},{"id":"UBUNTU-CVE-2026-91752","description":"GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.","status":"published","published":"2026-09-15T01:16:00Z","modified":"2026-10-17T13:01:17.321124807Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:57:40.980117Z"},{"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"}]}}