Microsoft Identity Web Exposes Client Secrets and Certificate Information in Service Logs
Published Apr 9, 2025 · Updated Oct 22, 2026 · Also known as GHSA-rpq8-q44m-2rpg
Original summary
Normalized public record · Updated Oct 22, 2026
Microsoft Identity Web Exposes Client Secrets and Certificate Information in Service Logs
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
_What kind of vulnerability is it? Who is impacted?_
Potential impact
What kind of vulnerability is it? Who is impacted? Description: This vulnerability affects confidential client applications, including daemons, web apps, and web APIs. Under specific circumstances, sensitive information such as client secrets or certificate details may be exposed in the service logs of these applications. Service logs are intended to be handled securely. Impact: The vulnerability impacts service logs that meet the following criteria: - Logging Level: Logs are generated at the information level. - Credential Descriptions: containing: Additionally, logs of services using Base64 encoded certificates or certificate paths with password credential descriptions are also affected if the certificates are invalid or expired, regardless of the log level. Note that these credentials are not usable due to their invalid or expired status. If your service logs are handled securely, you are not impacted. Otherwise, the following table shows when you can be impacted | Log Level Information for Microsoft.Identity.Web | Invalid Certificate -- | -- | -- One of the ClientCredentials credential description has a CredentialSource = Base64Encoded or (CredentialSource = Path) | Impacted | Impacted One of the ClientCredentials credential description is a Client secret (CredentialSource = ClientSecret) | Impacted | Not impacted Other credential descriptions | Not Impacted | Not Impacted
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- GHSA-rpq8-q44m-2rpg
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Apr 9, 2025 · Last refreshed Oct 22, 2026