# CVE-2026-78628: Improper Input Validation in the Okta Credential Provider for Windows

> CVE-2026-78628: Improper Input Validation in the Okta Credential Provider for Windows. CVSS 6.0 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-78628
Last updated: 2026-10-15T20:38:04Z

- Published: 2026-10-13 20:07 UTC · Updated: 2026-10-15 20:38 UTC · Assigner: Okta
- CVSS: 6.0 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.13%, 3th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-125, CWE-20, CWE-787

## Description

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 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.

## Affected vendors and products

- Okta: Okta Credential Provider for Windows

## Tracked companies

- [Okta](https://rewindex.com/company/okta.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-78628)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-78628)
- [https://trust.okta.com/security-advisories/improper-input-validation-in-the-okta-credential-provider-for-windows-cve-2026-78628](https://trust.okta.com/security-advisories/improper-input-validation-in-the-okta-credential-provider-for-windows-cve-2026-78628)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-78628 · Markdown: https://rewindex.com/cve/CVE-2026-78628.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-78628 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:54.760Z