{"id":"CVE-2026-13122","details":"OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled","modified":"2026-07-11T04:03:39.566027595Z","published":"2026-07-06T14:32:29.371Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"2.6.0"},{"last_affected":"2.6.20"},{"introduced":"2.7_alpha1"},{"last_affected":"2.7.4"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"2.6.0"},{"fixed":"2.6.20"},{"introduced":"2.7_alpha1"},{"fixed":"2.7.4"}],"source":"DESCRIPTION"}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13122.json","cwe_ids":["CWE-617"],"cna_assigner":"OpenVPN"},"references":[{"type":"ADVISORY","url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-13122"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13122.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13122"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openvpn/openvpn","events":[{"introduced":"b999466418dddb89721be5455f03bacd9b221b1d"},{"fixed":"4dee614e4e799d6d4a20bffabd902291c86406f2"},{"introduced":"ee1577744fb09af760dc319d57746e6abc55db85"},{"fixed":"b25bb2a8bda814edab39b4246d4e296330a7a29e"}],"database_specific":{"extracted_events":[{"introduced":"2.6.0"},{"fixed":"2.6.21"},{"introduced":"2.7"},{"fixed":"2.7.5"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*"}}],"versions":["v2.6.20","v2.7.4","v2.7.3","v2.7.2","v2.7.1","v2.6.19","v2.7.0","v2.6.18","v2.6.17","v2.6.16","v2.6.15","v2.6.14","v2.6.13","v2.6.12","v2.6.11","v2.6.10","v2.6.9","v2.6.8","v2.6.7","v2.6.6","v2.6.5","v2.6.4","v2.6.3","v2.6.2","v2.6.1","v2.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-13122.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}