# CVE-2026-47639: Microsoft Office SharePoint cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-47639-microsoft-office-sharepoint-cross-site-scripting  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-47639 · Severity: medium · CVSS 5.4 · Published 2026-06-09

Microsoft Office SharePoint, a widely used collaboration and document management platform, is vulnerable to a security flaw that allows attackers to perform spoofing. By tricking a user into interacting with a malicious link or page, an attacker can execute unauthorized scripts in the user's browser session. This could lead to the theft of sensitive information or unauthorized actions performed on behalf of the user within the SharePoint environment.

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

## Quick answers

**Is CVE-2026-47639 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47639 being exploited in the wild.

**How severe is CVE-2026-47639?** Medium severity, with a CVSS score of 5.4, published 9 June 2026.

**Which products and versions are affected?** Microsoft Office SharePoint.

**Is there a fix for CVE-2026-47639?** 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-2026-47639 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-47639?** Check whether you run Microsoft SharePoint. 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

A cross-site scripting (XSS) vulnerability exists in Microsoft Office SharePoint due to improper neutralization of input during web page generation (CWE-79). An attacker can exploit this by sending a specially crafted request to a SharePoint server, which requires a user to interact with a malicious link or page (User Interaction: Required). Successful exploitation allows the attacker to perform spoofing and execute arbitrary script code in the context of the victim's browser session. The vulnerability is reachable over the network and has been assigned a CVSS 3.1 base score of 5.4.

## Affected products

- Microsoft Office SharePoint

## Timeline

- 2026-06-09: disclosed: Initial publication of the vulnerability advisory.
- 2026-06-09: advisory: Microsoft released security update information.

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47639](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47639)

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