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CVE-2026-58647: Microsoft PowerBI Report Server Spoofing Vulnerability

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-11-01
• Weakness: CWE-79

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Power BI allows an authorized attacker to perform spoofing over a network.

Affected products

• Microsoft Power BI Report Server: before 15.0.1121.120 — fixed in 15.0.1121.120
• Microsoft Power BI Report Server: from 1.6.0 before 1.26.9682.1442 — fixed in 1.26.9682.1442

How to fix

Upgrade to a fixed version: Microsoft Power BI Report Server 15.0.1121.120; Microsoft Power BI Report Server 1.26.9682.1442. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58647

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