network-manager-vpnc — security advisory

{
  "id": "1d25ea4b2be963cb779ce6c5300cd22a71a2754305584b9b80f3aae35417a675",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-91840",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-91840",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-91840",
    "products": [
      {
        "name": {
          "value": "network-manager-vpnc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.2.8-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2.8-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2.8-6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2.8-7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2.8-8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.0-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.0-4",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "network-manager-vpnc",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.4.0-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.4.0-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.4.0-4",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-91840",
      "aliases": [
        "DEBIAN-CVE-2026-91840"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "network-manager-vpnc",
            "purl": "pkg:deb/debian/network-manager-vpnc?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "1.2.8-4",
            "1.2.8-5",
            "1.2.8-6",
            "1.2.8-7",
            "1.2.8-8",
            "1.4.0-1",
            "1.4.0-2",
            "1.4.0-3",
            "1.4.0-4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91840.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "network-manager-vpnc",
            "purl": "pkg:deb/debian/network-manager-vpnc?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "1.4.0-2",
            "1.4.0-3",
            "1.4.0-4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91840.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-16T18:00:06.850592068Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-91840"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-91840"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-91840",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 347625,
  "published_at": "2026-09-25T18:17:32.793+00:00"
}