CVE-2026-91840

{"id": "CVE-2026-91840", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-91840", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-26T03:55:53.355838Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "patrick@puiterwijk.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "patrick@puiterwijk.org", "affectedData": [{"vendor": "GNOME", "product": "NetworkManager-vpnc", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "semver"}], "packageName": "network-manager-vpnc", "collectionURL": "https://gitlab.gnome.org/GNOME/NetworkManager-vpnc", "defaultStatus": "unaffected"}]}], "published": "2026-09-25T18:17:32.793", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-91840", "source": "patrick@puiterwijk.org"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533642", "source": "patrick@puiterwijk.org"}, {"url": "https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19", "source": "patrick@puiterwijk.org"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "patrick@puiterwijk.org", "description": [{"lang": "en", "value": "CWE-93"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in NetworkManager-vpnc. This vulnerability allows a local unprivileged user to escalate privileges to root. By injecting a newline character into the VPN username field, an attacker can manipulate the vpnc configuration to execute an arbitrary program with root privileges when the malicious VPN connection is activated."}], "lastModified": "2026-09-30T19:57:08.043", "sourceIdentifier": "patrick@puiterwijk.org"}