{"id":"CVE-2026-54732","aliases":["EUVD-2026-67161","GHSA-gmxc-r82q-347r"],"status":"published","title":"libreoffice-convert: path traversal / arbitrary file write","description":"libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00416,"percentile":0.36257,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2026-08-27T17:21:50Z","modified":"2026-10-28T02:30:31Z","fixes":[{"ecosystem":"npm","package":"libreoffice-convert","fixed_in":["1.8.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"libreoffice-convert","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2"}]}]},{"source":"osv","ecosystem":"npm","package":"libreoffice-convert","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.8.2"}]}]}],"products":[{"vendor":"elwerene","product":"libreoffice-convert"}],"references":[{"url":"https://github.com/elwerene/libreoffice-convert/security/advisories/GHSA-gmxc-r82q-347r","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/elwerene/libreoffice-convert/commit/b78f17df9b9183bd503fc4635fc8b3df6705047b","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/advisories/GHSA-gmxc-r82q-347r"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54732.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54732","tags":["advisory"]},{"url":"https://github.com/elwerene/libreoffice-convert","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-54732","title":"libreoffice-convert: path traversal / arbitrary file write","description":"libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.","status":"published","published":"2026-08-27T17:21:50.743Z","modified":"2026-08-28T14:54:16.963Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T13:38:09.774038Z"}],"euvd":[{"id":"EUVD-2026-67161","description":"libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.","status":"published","published":"2026-08-27T17:21:50Z","modified":"2026-08-28T14:54:16Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T18:01:23.608347Z"}],"ghsa":[{"id":"GHSA-gmxc-r82q-347r","title":"libreoffice-convert vulnerable to path traversal / arbitrary file write","description":"### Impact\noptions.fileName is used to build a filesystem path\n(path.join(tempDir.name, fileName)) and the caller-supplied document buffer is\nwritten there, but fileName is never reduced to a base name. A fileName containing\n\"../\" escapes the temporary directory, so a caller can write arbitrary content to an\narbitrary path the process can write to (e.g. ~/.ssh/authorized_keys, an /etc/cron.d\nentry, or a web root).\n\n### Patches\nVersion 1.8.2 uses `path.basename` on `filename` to make sure the temp directory can not be escaped.\n\n### Workarounds\nMake sure you supply the filename yourself and don't have it user supplied or use `path.basename` on `filename` before using it in `libreoffice-convert`.","status":"published","published":"2026-08-27T17:23:16Z","modified":"2026-08-27T17:23:17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:41:07.031507Z"}],"nvd":[{"id":"CVE-2026-54732","description":"libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.","status":"published","published":"2026-08-27T20:17:50.143Z","modified":"2026-09-09T21:09:13.08Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:42.035353Z"}],"osv":[{"id":"CVE-2026-54732","title":"libreoffice-convert: path traversal / arbitrary file write","description":"libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.","status":"published","published":"2026-08-27T17:21:50.743Z","modified":"2026-10-28T02:30:31.25056586Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:45:10.818486Z"},{"id":"GHSA-gmxc-r82q-347r","title":"libreoffice-convert vulnerable to path traversal / arbitrary file write","description":"### Impact\noptions.fileName is used to build a filesystem path\n(path.join(tempDir.name, fileName)) and the caller-supplied document buffer is\nwritten there, but fileName is never reduced to a base name. A fileName containing\n\"../\" escapes the temporary directory, so a caller can write arbitrary content to an\narbitrary path the process can write to (e.g. ~/.ssh/authorized_keys, an /etc/cron.d\nentry, or a web root).\n\n### Patches\nVersion 1.8.2 uses `path.basename` on `filename` to make sure the temp directory can not be escaped.\n\n### Workarounds\nMake sure you supply the filename yourself and don't have it user supplied or use `path.basename` on `filename` before using it in `libreoffice-convert`.","status":"published","published":"2026-08-27T17:23:16Z","modified":"2026-08-27T17:40:40.102977Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:48.191583Z"}]}}