{"id":"CVE-2026-7836","aliases":["ALPINE-CVE-2026-7836","DEBIAN-CVE-2026-7836","EUVD-2026-31222","GHSA-766c-rr8x-xjvp","UBUNTU-CVE-2026-7836"],"status":"published","title":"hextoint macro uppercase bug","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","severity":{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00257,"percentile":0.17484,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-682"],"published":"2026-05-21T07:35:13Z","modified":"2026-11-03T06:32:58Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"netatalk","fixed_in":["4.5.0-r0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"netatalk","fixed_in":["4.5.0~ds-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.24","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.0-r0"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.3~ds-1","4.2.3~ds-1+deb13u1","4.2.3~ds-1+deb13u2","4.2.3~ds-2","4.2.3~ds-2.1","4.4.1~ds-1","4.4.2~ds-1","4.4.3~ds-1","4.5.0~ds-1","4.5.0~ds-2","4.5.0~ds-3","4.5.1~ds-1"]},{"source":"osv","ecosystem":"Debian:14","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.0~ds-1"}]}],"versions":["4.2.3~ds-1","4.2.3~ds-2","4.2.3~ds-2.1","4.4.1~ds-1","4.4.2~ds-1","4.4.3~ds-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.2-1ubuntu1","2.2.2-1ubuntu2","2.2.2-1ubuntu2.2","2.2.2-1ubuntu2.2+esm1","2.2.2-1ubuntu2.2+esm2","2.2.2-1ubuntu2.2+esm3","2.2.2-1ubuntu2.2+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.5-1","2.2.5-1ubuntu0.2","2.2.5-1ubuntu0.2+esm1","2.2.5-1ubuntu0.2+esm2","2.2.5-1ubuntu0.2+esm3","2.2.5-1ubuntu0.2+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.6-1","2.2.6-1ubuntu0.18.04.2","2.2.6-1ubuntu0.18.04.2+esm1","2.2.6-1ubuntu0.18.04.2+esm2","2.2.6-1ubuntu0.18.04.2+esm3","2.2.6-1ubuntu0.18.04.2+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.12~ds-3","3.1.12~ds-4","3.1.12~ds-4ubuntu0.20.04.1","3.1.12~ds-4ubuntu0.20.04.3","3.1.12~ds-4ubuntu0.20.04.3+esm1","3.1.12~ds-4ubuntu0.20.04.4","3.1.12~ds-4ubuntu0.20.04.4+esm1","3.1.12~ds-4ubuntu0.20.04.4+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.12~ds-9","3.1.12~ds-9build1","3.1.12~ds-9ubuntu0.22.04.1","3.1.12~ds-9ubuntu0.22.04.3","3.1.12~ds-9ubuntu0.22.04.3+esm1","3.1.12~ds-9ubuntu0.22.04.4","3.1.12~ds-9ubuntu0.22.04.4+esm1","3.1.12~ds-9ubuntu0.22.04.4+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.15~ds-1ubuntu1","3.1.18~ds-1","3.1.18~ds-1build2","3.1.18~ds-1build4","3.1.18~ds-1ubuntu0.1~esm1","3.1.18~ds-1ubuntu0.1~esm2","3.1.18~ds-1ubuntu0.1~esm3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.2~ds-4","4.2.1~ds-1","4.2.3~ds-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.3~ds-2.1","4.4.3~ds-1","4.5.0~ds-3","4.5.1~ds-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"netatalk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.3~ds-1","4.2.3~ds-2","4.2.3~ds-2.1","4.2.3~ds-2.1ubuntu0.1","4.2.3~ds-2.1ubuntu0.2"]}],"products":[{"vendor":"netatalk","product":"netatalk"}],"references":[{"url":"https://netatalk.io/security/CVE-2026-7836","tags":["vendor-advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7836"},{"url":"https://github.com/advisories/GHSA-766c-rr8x-xjvp"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-7836","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-7836","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-7836","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-7836","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-7836","title":"hextoint macro uppercase bug","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T07:35:13.096Z","modified":"2026-05-21T12:12:38.186Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-682"],"updated_at":"2026-11-02T14:20:06.216584Z"}],"euvd":[{"id":"EUVD-2026-31222","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T07:35:13Z","modified":"2026-05-21T12:12:38Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T18:21:13.845677Z"}],"ghsa":[{"id":"GHSA-766c-rr8x-xjvp","title":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper...","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T09:32:11Z","modified":"2026-05-21T09:32:17Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"cwes":["CWE-682"],"updated_at":"2026-11-02T15:08:15.106873Z"}],"nvd":[{"id":"CVE-2026-7836","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T08:16:23.403Z","modified":"2026-07-23T16:10:00.137Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-682"],"updated_at":"2026-11-02T14:12:19.752984Z"}],"osv":[{"id":"ALPINE-CVE-2026-7836","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T08:16:23.403Z","modified":"2026-11-03T06:32:58.101054602Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-03T07:16:09.603409Z"},{"id":"DEBIAN-CVE-2026-7836","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T08:16:23.403Z","modified":"2026-10-01T03:03:42.033310444Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T15:46:03.502256Z"},{"id":"UBUNTU-CVE-2026-7836","description":"An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.","status":"published","published":"2026-05-21T08:16:00Z","modified":"2026-10-17T13:01:09.791391243Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T16:57:18.015985Z"}]}}