{"id":"CVE-2026-109831","aliases":["DEBIAN-CVE-2026-109831","EUVD-2026-104795","GHSA-q9jg-8mw4-m3mw","OESA-2026-4535","OESA-2026-4536","OESA-2026-4537","OESA-2026-4538","UBUNTU-CVE-2026-109831"],"status":"published","title":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by...","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00207,"percentile":0.10919,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2026-10-20T04:34:19Z","modified":"2026-10-29T09:15:29Z","fixes":[{"ecosystem":"Debian:14","package":"unrtf","fixed_in":["0.21.13-1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"unrtf","fixed_in":["0.21.13-1.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"unrtf","fixed_in":["0.21.13-1.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"unrtf","fixed_in":["0.21.13-1.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"unrtf","fixed_in":["0.21.13-1.oe2403sp4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-1","0.21.10-clean-2","0.21.13-1"]},{"source":"osv","ecosystem":"Debian:13","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-1","0.21.10-clean-2","0.21.13-1"]},{"source":"osv","ecosystem":"Debian:14","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.13-1"}]}],"versions":["0.21.10-clean-1","0.21.10-clean-2"]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.13-1.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.13-1.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.13-1.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.13-1.oe2403sp4"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.5-3","0.21.9-clean-2","0.21.9-clean-3~build0.16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.9-clean-3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-2build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"unrtf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.10-clean-2","0.21.10-clean-2build1"]}],"products":[{"vendor":"gnu project","product":"unrtf"}],"references":[{"url":"https://savannah.gnu.org/news/?id=10925","tags":["report"]},{"url":"https://jvn.jp/en/jp/JVN29783594/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109831","tags":["advisory"]},{"url":"https://jvn.jp/en/jp/JVN29783594"},{"url":"https://github.com/advisories/GHSA-q9jg-8mw4-m3mw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-109831","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4535","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4536","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4537","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4538","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-109831","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109831","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-109831","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","status":"published","published":"2026-10-20T04:34:19.617Z","modified":"2026-10-20T19:15:55.705Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:20:11.581788Z"}],"euvd":[{"id":"EUVD-2026-104795","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","status":"published","published":"2026-10-20T04:34:19Z","modified":"2026-10-20T19:15:55Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:42.590373Z"}],"ghsa":[{"id":"GHSA-q9jg-8mw4-m3mw","title":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by...","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","status":"published","published":"2026-10-20T06:31:10Z","modified":"2026-10-20T06:31:16Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/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":"medium"},{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:14:02.928159Z"}],"nvd":[{"id":"CVE-2026-109831","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","status":"published","published":"2026-10-20T05:16:53.707Z","modified":"2026-10-20T20:17:14.36Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/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":"medium","assessor":"secondary"},{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:13:00.83844Z"}],"osv":[{"id":"DEBIAN-CVE-2026-109831","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","status":"published","published":"2026-10-20T05:16:53.707Z","modified":"2026-10-27T01:00:06.617309936Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/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":"medium"}],"updated_at":"2026-11-02T15:45:49.381767Z"},{"id":"OESA-2026-4535","title":"unrtf security update","description":"UnRTF is a command-line program written in C which converts documents in Rich Text Format (.rtf) to HTML, LaTeX, troff macros, and RTF itself. Converting to HTML, it supports a number of features of Rich Text Format:     * Changes in the text\u0026amp;apos;s font, size, weight (bold), and slant (italic)     * Underlines and strikethroughs     * Partial support for text shadowing, outlining, embossing, or engraving     * Capitalizations     * Superscripts and subscripts     * Expanded and condensed text     * Changes in the foreground and background colors     * Conversion of special characters to HTML entities\r\n\r\nSecurity Fix(es):\n\nUnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.(CVE-2026-109831)","status":"published","published":"2026-10-29T09:02:39Z","modified":"2026-10-29T09:15:28.310427444Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4536","title":"unrtf security update","description":"UnRTF is a command-line program written in C which converts documents in Rich Text Format (.rtf) to HTML, LaTeX, troff macros, and RTF itself. Converting to HTML, it supports a number of features of Rich Text Format:     * Changes in the text\u0026amp;apos;s font, size, weight (bold), and slant (italic)     * Underlines and strikethroughs     * Partial support for text shadowing, outlining, embossing, or engraving     * Capitalizations     * Superscripts and subscripts     * Expanded and condensed text     * Changes in the foreground and background colors     * Conversion of special characters to HTML entities\r\n\r\nSecurity Fix(es):\n\nUnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.(CVE-2026-109831)","status":"published","published":"2026-10-29T09:02:40Z","modified":"2026-10-29T09:15:28.61913819Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4537","title":"unrtf security update","description":"UnRTF is a command-line program written in C which converts documents in Rich Text Format (.rtf) to HTML, LaTeX, troff macros, and RTF itself. Converting to HTML, it supports a number of features of Rich Text Format:     * Changes in the text\u0026amp;apos;s font, size, weight (bold), and slant (italic)     * Underlines and strikethroughs     * Partial support for text shadowing, outlining, embossing, or engraving     * Capitalizations     * Superscripts and subscripts     * Expanded and condensed text     * Changes in the foreground and background colors     * Conversion of special characters to HTML entities\r\n\r\nSecurity Fix(es):\n\nUnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.(CVE-2026-109831)","status":"published","published":"2026-10-29T09:02:41Z","modified":"2026-10-29T09:15:29.511566149Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4538","title":"unrtf security update","description":"UnRTF is a command-line program written in C which converts documents in Rich Text Format (.rtf) to HTML, LaTeX, troff macros, and RTF itself. Converting to HTML, it supports a number of features of Rich Text Format:     * Changes in the text\u0026amp;apos;s font, size, weight (bold), and slant (italic)     * Underlines and strikethroughs     * Partial support for text shadowing, outlining, embossing, or engraving     * Capitalizations     * Superscripts and subscripts     * Expanded and condensed text     * Changes in the foreground and background colors     * Conversion of special characters to HTML entities\r\n\r\nSecurity Fix(es):\n\nUnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.(CVE-2026-109831)","status":"published","published":"2026-10-29T09:02:41Z","modified":"2026-10-29T09:15:29.804125439Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"UBUNTU-CVE-2026-109831","description":"UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.","status":"published","published":"2026-10-20T05:16:00Z","modified":"2026-10-28T20:17:05.007643795Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","level":"medium"},{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.591851Z"}]}}