# CVE-2026-49159: Microsoft Microsoft Graph information disclosure

Source: https://junglewise.ai/threats/cve-2026-49159-microsoft-microsoft-graph-information-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-24. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-49159 · Severity: medium · CVSS 6.5 · Published 2026-07-24

Microsoft Graph, the primary gateway for accessing data and intelligence across Microsoft 365 services, contains a vulnerability that could allow unauthorized access to sensitive information. An attacker with basic user credentials on the network could exploit this flaw to view data they are not permitted to see. This could lead to the exposure of confidential organizational data or personal user information stored within the Microsoft cloud ecosystem.

Technologies: [Microsoft Graph](https://junglewise.ai/threats/technologies/graph). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-49159 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49159 being exploited in the wild.

**How severe is CVE-2026-49159?** Medium severity, with a CVSS score of 6.5, published 24 July 2026.

**Which products and versions are affected?** Microsoft Graph All versions.

**Is there a fix for CVE-2026-49159?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-49159 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-49159?** Check whether you run Microsoft Graph at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An information disclosure vulnerability exists in Microsoft Graph, classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The flaw allows an attacker with low-level 'Authorized' privileges to disclose sensitive information over a network. According to the CVSS vector, the attack is low complexity, requires no user interaction, and has a high impact on confidentiality. As Microsoft Graph is an exclusively hosted service, the fix is typically managed by the provider on the backend.

## Affected products

- Microsoft Microsoft Graph All versions

## Timeline

- 2026-07-24: advisory: Initial disclosure by Microsoft and NVD

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49159](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49159)

## Related threats

- [Microsoft Graph incorrect authorization privilege escalation](https://junglewise.ai/threats/cve-2026-114162-incorrect-authorization-in-microsoft-graph-allows-an-authorized)
- [Microsoft Graph information disclosure](https://junglewise.ai/threats/cve-2026-47655-microsoft-graph-information-disclosure)