Vulnerability-Lookup

WID-SEC-W-2026-1264

Vulnerability from csaf_certbund - Published: 2026-04-23 22:00 - Updated: 2026-05-20 22:00

Summary

OpenVPN: Mehrere Schwachstellen

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: OpenVPN ist eine Open Source Software zum Aufbau eines Virtuellen Privaten Netzwerkes (VPN) über eine verschlüsselte TLS-Verbindung. Zur Verschlüsselung werden die Bibliotheken des Programmes OpenSSL benutzt.

Angriff: Ein Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um einen Denial of Service Angriff durchzuführen, und um Informationen offenzulegen.

Betroffene Betriebssysteme: - Linux - UNIX - Windows

CVE-2026-35058

Affected products

Known affected 4 products

Product	Identifier	Version
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
Open Source OpenVPN <2.7.2 Open Source / OpenVPN		<2.7.2
Open Source OpenVPN <2.6.20 Open Source / OpenVPN		<2.6.20
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2026-40215

Affected products

Known affected 4 products

Product	Identifier	Version
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
Open Source OpenVPN <2.7.2 Open Source / OpenVPN		<2.7.2
Open Source OpenVPN <2.6.20 Open Source / OpenVPN		<2.6.20
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

References

10 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://community.openvpn.net/Security%20Announce…	external
https://community.openvpn.net/Security%20Announce…	external
https://community.openvpn.net/ReleaseHistory	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://bodhi.fedoraproject.org/updates/FEDORA-EP…	external
https://bodhi.fedoraproject.org/updates/FEDORA-EP…	external
https://bodhi.fedoraproject.org/updates/FEDORA-EP…	external
https://ubuntu.com/security/notices/USN-8286-1	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "OpenVPN ist eine Open Source Software zum Aufbau eines Virtuellen Privaten Netzwerkes (VPN) \u00fcber eine verschl\u00fcsselte TLS-Verbindung. Zur Verschl\u00fcsselung werden die Bibliotheken des Programmes OpenSSL benutzt.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren, und um Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1264 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1264.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1264 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1264"
      },
      {
        "category": "external",
        "summary": "OpenVPN Security Announcements vom 2026-04-23",
        "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-35058"
      },
      {
        "category": "external",
        "summary": "OpenVPN Security Announcements vom 2026-04-23",
        "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-40215"
      },
      {
        "category": "external",
        "summary": "OpenVPN Release History vom 2026-04-23",
        "url": "https://community.openvpn.net/ReleaseHistory"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2026-086ACF3001 vom 2026-04-27",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-086acf3001"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-EPEL-2026-A534B99D27 vom 2026-04-27",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-a534b99d27"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-EPEL-2026-07552E95EF vom 2026-04-27",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-07552e95ef"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-EPEL-2026-5560315E97 vom 2026-04-27",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-5560315e97"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8286-1 vom 2026-05-20",
        "url": "https://ubuntu.com/security/notices/USN-8286-1"
      }
    ],
    "source_lang": "en-US",
    "title": "OpenVPN: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-05-20T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-21T07:57:31.725+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1264",
      "initial_release_date": "2026-04-23T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-23T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-04-27T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Fedora aufgenommen"
        },
        {
          "date": "2026-05-20T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74185",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.7.2",
                "product": {
                  "name": "Open Source OpenVPN \u003c2.7.2",
                  "product_id": "T053305"
                }
              },
              {
                "category": "product_version",
                "name": "2.7.2",
                "product": {
                  "name": "Open Source OpenVPN 2.7.2",
                  "product_id": "T053305-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:openvpn:openvpn:2.7.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.6.20",
                "product": {
                  "name": "Open Source OpenVPN \u003c2.6.20",
                  "product_id": "T053306"
                }
              },
              {
                "category": "product_version",
                "name": "2.6.20",
                "product": {
                  "name": "Open Source OpenVPN 2.6.20",
                  "product_id": "T053306-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:openvpn:openvpn:2.6.20"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "OpenVPN"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-35058",
      "product_status": {
        "known_affected": [
          "T000126",
          "T053305",
          "T053306",
          "74185"
        ]
      },
      "release_date": "2026-04-23T22:00:00.000+00:00",
      "title": "CVE-2026-35058"
    },
    {
      "cve": "CVE-2026-40215",
      "product_status": {
        "known_affected": [
          "T000126",
          "T053305",
          "T053306",
          "74185"
        ]
      },
      "release_date": "2026-04-23T22:00:00.000+00:00",
      "title": "CVE-2026-40215"
    }
  ]
}

CVE-2026-35058 (GCVE-0-2026-35058)

Vulnerability from cvelistv5 – Published: 2026-06-08 19:29 – Updated: 2026-06-08 19:49

Summary

Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-617 - Reachable assertion

Assigner

OpenVPN

References

4 references

URL	Tags
https://community.openvpn.net/Security%20Announce…	vendor-advisory
https://community.openvpn.net/ReleaseHistory#open…	release-notes
https://community.openvpn.net/ReleaseHistory#open…	release-notes
https://www.talosintelligence.com/vulnerability_r…

Impacted products

1 product

Vendor	Product	Version
OpenVPN	OpenVPN	Affected: 2.6.0 , ≤ 2.6.19 (semver) Affected: 2.7_alpha1 , ≤ 2.7.1 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-08T19:47:23.911Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2381"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-35058",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T19:49:03.100020Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-08T19:49:17.361Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenVPN",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThanOrEqual": "2.6.19",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "2.7.1",
              "status": "affected",
              "version": "2.7_alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-617",
              "description": "CWE-617 Reachable assertion",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-08T19:29:56.309Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-35058"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2026-35058",
    "datePublished": "2026-06-08T19:29:56.309Z",
    "dateReserved": "2026-04-13T10:28:10.361Z",
    "dateUpdated": "2026-06-08T19:49:17.361Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-40215 (GCVE-0-2026-40215)

Vulnerability from cvelistv5 – Published: 2026-06-08 19:59 – Updated: 2026-06-08 19:59

Summary

A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.

Severity

6.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L

CWE

CWE-125 - Out-of-bounds read
CWE-416 - Use after free

Assigner

OpenVPN

References

3 references

URL	Tags
https://community.openvpn.net/Security%20Announce…	vendor-advisory
https://community.openvpn.net/ReleaseHistory#open…	release-notes
https://community.openvpn.net/ReleaseHistory#open…	release-notes

Impacted products

1 product

Vendor	Product	Version
OpenVPN	OpenVPN	Affected: 2.6.0 , ≤ 2.6.19 (semver) Affected: 2.7_alpha1 , ≤ 2.7.1 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenVPN",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThanOrEqual": "2.6.19",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "2.7.1",
              "status": "affected",
              "version": "2.7_alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125 Out-of-bounds read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 Use after free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-08T19:59:20.481Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-40215"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2026-40215",
    "datePublished": "2026-06-08T19:59:20.481Z",
    "dateReserved": "2026-04-13T10:28:10.354Z",
    "dateUpdated": "2026-06-08T19:59:20.481Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2026-1264

CVE-2026-35058 (GCVE-0-2026-35058)

CVE-2026-40215 (GCVE-0-2026-40215)

Tags

Sightings

Nomenclature