{"id":"CVE-2026-91203","aliases":["ALSA-2026:95570","DEBIAN-CVE-2026-91203","EUVD-2026-83296","GHSA-2wj2-6xq8-f5rx","RLSA-2026:95570","UBUNTU-CVE-2026-91203"],"status":"published","title":"Cockpit-files: cockpit-files: arbitrary file ownership and permission modification via symlink race condition","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","severity":{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00155,"percentile":0.04697,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-363"],"published":"2026-09-18T19:21:06Z","modified":"2026-11-11T12:31:31Z","fixes":[{"ecosystem":"Debian:14","package":"cockpit-files","fixed_in":["45-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"AlmaLinux:10","package":"cockpit-files","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"36.1-1.el10_2"}]}],"bundled":3},{"source":"osv","ecosystem":"Debian:14","package":"cockpit-files","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"45-1"}]}],"versions":["36-1","36-1~bpo13+1","38-1","39-1","40-1","41-1","43-1","43-1~bpo13+1","44-1","44-1~bpo13+1","45-1~bpo13+1"]},{"source":"osv","ecosystem":"Rocky Linux:10","package":"cockpit-files","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:36.1-1.el10_2"}]}],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"cockpit-files","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["39-1","40-1","41-1","43-1","44-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"cockpit-files","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["36-1","39-1"]}],"products":[{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 9"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:95570","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:98566","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-91203","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2465632","tags":["issue-tracking","x_refsource_REDHAT","exploit","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91203"},{"url":"https://github.com/advisories/GHSA-2wj2-6xq8-f5rx"},{"url":"https://access.redhat.com/security/cve/CVE-2026-91202","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-91205","tags":["report"]},{"url":"https://bugzilla.redhat.com/2465632","tags":["report"]},{"url":"https://bugzilla.redhat.com/2465834","tags":["report"]},{"url":"https://bugzilla.redhat.com/2466442","tags":["report"]},{"url":"https://errata.almalinux.org/10/ALSA-2026-95570.html","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-91203","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:95570","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2465834","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466442","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-91203","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-91203","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-91203","title":"Cockpit-files: cockpit-files: arbitrary file ownership and permission modification via symlink race condition","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","status":"published","published":"2026-09-18T19:21:06.403Z","modified":"2026-11-11T11:30:57.079Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-363"],"updated_at":"2026-11-11T12:57:44.071307Z"}],"euvd":[{"id":"EUVD-2026-83296","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","status":"published","published":"2026-09-18T19:21:06Z","modified":"2026-11-11T11:30:57Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-11T12:28:31.128551Z"}],"ghsa":[{"id":"GHSA-2wj2-6xq8-f5rx","title":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing...","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","status":"published","published":"2026-09-18T21:32:27Z","modified":"2026-11-11T12:31:31Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium"}],"cwes":["CWE-363"],"updated_at":"2026-11-11T12:34:05.637143Z"}],"nvd":[{"id":"CVE-2026-91203","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","status":"published","published":"2026-09-18T20:17:29.397Z","modified":"2026-11-11T12:20:01.91Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-363"],"updated_at":"2026-11-11T14:25:03.704592Z"}],"osv":[{"id":"DEBIAN-CVE-2026-91203","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","status":"published","published":"2026-09-18T20:17:29.397Z","modified":"2026-09-29T10:00:09.029898431Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:46:06.410207Z"},{"id":"RLSA-2026:95570","title":"Moderate: cockpit-files security update","description":"A filesystem browser for Cockpit\n\nSecurity Fix(es):\n\n* cockpit-files: cockpit-files: Arbitrary file ownership and permission modification via symlink race condition (CVE-2026-91203)\n\n* cockpit-files: cockpit-files: Arbitrary file ownership change via symlink following in privileged paste (CVE-2026-91202)\n\n* cockpit-files: cockpit-files: Local attacker can hijack file ownership via symlink race (CVE-2026-91205)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-11-06T12:09:31.09095Z","modified":"2026-11-06T12:30:02.70556274Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:L","level":"medium"}],"updated_at":"2026-11-06T12:43:06.926783Z"},{"id":"UBUNTU-CVE-2026-91203","description":"A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.","status":"published","published":"2026-09-18T20:17:00Z","modified":"2026-10-17T13:01:16.994452361Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T16:57:40.980117Z"},{"id":"ALSA-2026:95570","title":"Moderate: cockpit-files security update","description":"A filesystem browser for Cockpit  \n\nSecurity Fix(es):  \n\n  * cockpit-files: cockpit-files: Arbitrary file ownership and permission modification via symlink race condition (CVE-2026-91203)\n  * cockpit-files: cockpit-files: Arbitrary file ownership change via symlink following in privileged paste (CVE-2026-91202)\n  * cockpit-files: cockpit-files: Local attacker can hijack file ownership via symlink race (CVE-2026-91205)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-11-05T00:00:00Z","modified":"2026-11-06T12:00:02.6612773Z","updated_at":"2026-11-06T12:12:56.168821Z"}]}}