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

Quick assessment

Affected
Okta Okta Credential Provider for Windows
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Windows 平台的 Okta 凭据提供程序在未验证序列化凭据缓冲区的情况下，将其解析为 Kerberos 登录结构。该过程未对缓冲区大小和打包字符串偏移量进行检查。处理格式错误的缓冲区可能导致凭据提供程序进程异常终止，或引发越界内存读写，进而可能导致相邻进程内存内容泄露至本地系统日志。

CVSS 6.0 · Medium EPSS 0.13% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
Okta Okta Credential Provider for Windows < 1.4.6.0 affected
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I. Basic Information for CVE-2026-78628

Vulnerability Information
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Vulnerability Title
Improper Input Validation in the Okta Credential Provider for Windows
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Okta Okta Credential Provider for Windows 0 ~ 1.4.6.0 -

II. Public POCs for CVE-2026-78628

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III. Intelligence Information for CVE-2026-78628

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Vendor Advisories for CVE-2026-78628 (1)

Same Patch Batch · Okta · 2026-10-13 · 3 CVEs total

CVE-2026-78633 6.5 MEDIUM Denial of Service in Okta RADIUS Agent Packet Parser
CVE-2026-78632 5.3 MEDIUM Insecure Default File Permissions in Okta RADIUS Agent Windows Installer

IV. Related Vulnerabilities

Same vendor: Okta
Same weakness: CWE-20

V. Comments for CVE-2026-78628

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