{"id":"CVE-2026-91837","state":"PUBLISHED","title":"Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection","description":"A flaw was found in NetworkManager-iodine, the iodine VPN plugin for NetworkManager. A local unprivileged user can exploit a vulnerability in how the 'nameserver' setting is processed when establishing an iodine VPN connection. By embedding shell metacharacters (special characters that can execute commands) in the 'nameserver' value, an attacker can inject and execute arbitrary commands. These commands run with root privileges before the application drops its elevated permissions, leading to local privilege escalation.","publishedAt":"2026-09-25T16:14:39.038Z","updatedAt":"2026-09-25T16:39:39.543Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"fedora"},"assigner":"fedora","products":["GNOME NetworkManager-iodine"],"affected":[{"vendor":"GNOME","product":"NetworkManager-iodine","packageName":"network-manager-iodine","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"semver"}],"collectionURL":"https://gitlab.gnome.org/GNOME/network-manager-iodine"}],"references":["https://access.redhat.com/security/cve/CVE-2026-91837","https://bugzilla.redhat.com/show_bug.cgi?id=2533634","https://gitlab.gnome.org/GNOME/network-manager-iodine/-/work_items/4"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/91xxx/CVE-2026-91837.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91837","state":"PUBLISHED","datePublished":"2026-09-25T16:14:39.038Z","dateUpdated":"2026-09-25T16:39:39.543Z","assignerShortName":"fedora","assignerOrgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateReserved":"2026-09-15T08:28:01.333Z"},"containers":{"cna":{"title":"Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection","descriptions":[{"lang":"en","value":"A flaw was found in NetworkManager-iodine, the iodine VPN plugin for NetworkManager. A local unprivileged user can exploit a vulnerability in how the 'nameserver' setting is processed when establishing an iodine VPN connection. By embedding shell metacharacters (special characters that can execute commands) in the 'nameserver' value, an attacker can inject and execute arbitrary commands. These commands run with root privileges before the application drops its elevated permissions, leading to local privilege escalation."}],"affected":[{"vendor":"GNOME","product":"NetworkManager-iodine","packageName":"network-manager-iodine","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"semver"}],"collectionURL":"https://gitlab.gnome.org/GNOME/network-manager-iodine"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-91837","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533634","name":"RHBZ#2533634","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://gitlab.gnome.org/GNOME/network-manager-iodine/-/work_items/4"}],"metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","description":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"fedora","orgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateUpdated":"2026-09-25T16:14:39.038Z"},"datePublic":"2026-09-15T09:25:02.015Z","x_redhatCweChain":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","workarounds":[{"lang":"en","value":"To mitigate this issue, remove the `NetworkManager-iodine` and `iodine` packages if they are not required for system functionality. These packages are not installed by default in minimal Red Hat Enterprise Linux installations.\n\n```bash\nsudo dnf remove NetworkManager-iodine iodine\n```\n\nIf these packages are necessary, ensure that only trusted users have the ability to create and activate VPN connections."}],"timeline":[{"lang":"en","time":"2026-09-15T09:27:50.959Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-09-15T09:25:02.015Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Andreas Gabriel Berbescu for reporting this issue."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-25T16:39:28.774813Z","id":"CVE-2026-91837","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-25T16:39:39.543Z"}}]}}}