Microsoft Security Update Guide · Power Platform
Microsoft PowerBI Report Server Spoofing Vulnerability
Published · updated 19 aug 2026
What does this mean?
- Spoofing. An attacker can pretend to be another user or source, for example through a misleading link or page.
- It can be exploited over the network (including from the internet if the service is reachable there), with an ordinary user account and if a user takes part, for example by opening a link or file.
- CVSS 8.0 out of 10: high. Microsoft rates it Important.
- No attacks reported; Microsoft expects exploitation to be less likely.
- What should you do? Install the security update for the version you run (or a later cumulative update):
- Power BI Report Server: KBRelease Notes
1.26.9682.1442
- Power BI Report Server: KBRelease Notes
Improper neutralization of input during web page generation ('cross-site scripting') in Power BI allows an authorized attacker to perform spoofing over a network.
What kind of flaw is this?
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Input is not cleaned before it appears in a web page (cross-site scripting). An attacker can run script in another user's browser.
Key facts
Released
14 jul 2026
Last revised
19 aug 2026 (v1.1)
Impact
Spoofing
Max severity
Important
Weakness
CVSS 3.1
8.0 / 7.0 (base / temporal)
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CPublicly disclosed
No
Exploited
No
Exploitability assessment
Exploitation Unlikely
Customer action required
Yes
Links
CVSS metrics
| Base score metrics | |
|---|---|
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity | High |
| Availability | High |
| Temporal score metrics | |
| Exploit Code Maturity | Unproven |
| Remediation Level | Official Fix |
| Report Confidence | Confirmed |
Affected products and updates
| Product | Update | Build |
|---|---|---|
| Power BI Report Server | KBRelease Notes · Security Update | 1.26.9682.1442 |
Revisions
| Version | Date | Note |
|---|---|---|
| 1.1 | 19 aug 2026 | Corrected the Power BI Report Server version in the Security Updates table to use the public release version instead of the internal build number. This is an informational change only. |
| 1 | 14 jul 2026 | Information published. |
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Source: Microsoft Security Update Guide. 365Fanatic is not affiliated with Microsoft.
