{"id":"CVE-2020-27819","aliases":["EUVD-2020-20320","GHSA-fp3r-w9w2-jg2f","JLSEC-2026-1294","UBUNTU-CVE-2020-27819","openSUSE-SU-2021:0812-1","openSUSE-SU-2024:11015-1"],"status":"published","title":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files....","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00825,"percentile":0.57886,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2021-02-23T03:40:01Z","modified":"2026-10-24T10:30:25Z","fixes":[{"ecosystem":"Julia","package":"libxls_jll","fixed_in":["1.6.2+0"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.2","package":"libxls","fixed_in":["1.6.2-lp152.2.3.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Julia","package":"libxls_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.6.2+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.0-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-1build1","1.0.0-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-2","1.3.1-2build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-2build2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.3-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1","1.5.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"r-cran-readxl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1"]},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"libxls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.2-lp152.2.3.1"}]}]}],"products":[{"vendor":"libxls","product":"libxls"},{"vendor":"libxls_project","product":"libxls"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1903296","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27819"},{"url":"https://github.com/advisories/GHSA-fp3r-w9w2-jg2f"},{"url":"https://ubuntu.com/security/CVE-2020-27819","tags":["report"]},{"url":"https://github.com/libxls/libxls/issues/84","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-27819","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/G6PICHOKDDWFUM2A34VZUNW6XR4NUUPC/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1179532","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-27819","tags":["web"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2020-27819","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2021-02-23T03:40:01Z","modified":"2024-08-04T16:25:42.389Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-20320","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2021-02-23T03:40:01Z","modified":"2024-08-04T16:25:42Z","updated_at":"2026-11-03T03:07:11.950168Z"}],"ghsa":[{"id":"GHSA-fp3r-w9w2-jg2f","title":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files....","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2022-05-24T17:42:53Z","modified":"2023-01-29T05:06:40Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:46:04.414181Z"}],"nvd":[{"id":"CVE-2020-27819","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2021-02-23T04:15:13.883Z","modified":"2026-06-17T03:09:40.823Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:37.687844Z"}],"osv":[{"id":"CVE-2020-27819","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2021-02-23T04:15:13.883Z","modified":"2026-10-24T10:30:25.724793615Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"JLSEC-2026-1294","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in `libxls/xls2csv.c:199`. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2026-08-13T10:57:26.913Z","modified":"2026-08-13T11:00:03.429363295Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:47:18.159338Z"},{"id":"UBUNTU-CVE-2020-27819","description":"An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.","status":"published","published":"2021-02-23T04:15:00Z","modified":"2026-10-17T12:56:13.486695318Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:24.541803Z"},{"id":"openSUSE-SU-2021:0812-1","title":"Security update for libxls","description":"This update for libxls fixes the following issues:\n\nlibxsl was updated to release 1.6.2:\n\n* Fix NULL pointer dereferences in the xls2csv tool [boo#1179532] [CVE-2020-27819]\n\nUpdate to release 1.6.1\n\n* Enabled decoding of non-Unicode character sets in older (BIFF5) XLS files.\n* Improved string conversion performance in newer files.\n\nupdate to 1.5.3:\n\n* Allow truncated XLS files\n* Fix long-standing 'extra column' bug #73\n* Support for RSTRING records (rich-text cells in older BIFF5 files) tidyverse/readxl#611 \n","status":"published","published":"2021-05-30T12:05:14Z","modified":"2026-02-04T02:27:59.295776Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:11015-1","title":"libxls-devel-1.6.2-2.2 on GA media","description":"These are all security issues fixed in the libxls-devel-1.6.2-2.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:32:11.218319Z","updated_at":"2026-11-02T16:58:34.894275Z"}]}}