{"id":"CVE-2026-78628","title":"The Okta Credential Provider for Windows does not validate a serialized credential buffer before interpreting it as a Kerberos logon structure","summary":"The Okta Credential Provider for Windows does not validate a serialized credential buffer before interpreting it as a Kerberos logon structure. The buffer size and packed string offsets are not checked. Processing a malformed buffer can …","severity":"medium","cvss":6,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-20","CWE-125","CWE-787"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T21:18:21.630","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78628","references":[{"url":"https://trust.okta.com/security-advisories/improper-input-validation-in-the-okta-credential-provider-for-windows-cve-2026-78628","label":"psirt@okta.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T21:58:14.188Z","slug":"CVE-2026-78628","body":"## Overview\n\nThe Okta Credential Provider for Windows does not validate a serialized credential buffer before interpreting it as a Kerberos logon structure. The buffer size and packed string offsets are not checked. Processing a malformed buffer can cause the credential provider process to terminate unexpectedly or lead to out-of-bounds memory reads and writes, which may result in the disclosure of adjacent process memory into local system logs.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":33,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}