# CVE-2026-109497: Microsoft Office SharePoint cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-109497-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-109497 · Severity: high · CVSS 7.3 · Published 2026-11-10

Microsoft Office SharePoint, a collaborative document management and content sharing platform, contains a cross-site scripting vulnerability that allows authorized users to inject malicious code into web pages. An attacker who has legitimate access could perform spoofing attacks, deceiving other users or redirecting them to malicious sites.

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

## Quick answers

**Is CVE-2026-109497 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109497 being exploited in the wild.

**How severe is CVE-2026-109497?** High severity, with a CVSS score of 7.3, published 10 November 2026.

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

**Is there a fix for CVE-2026-109497?** 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-2026-109497 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109497?** Check whether you run Microsoft Office 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

The vulnerability is an improper neutralization of user-controlled input during web page generation (XSS) in Microsoft Office SharePoint. It requires an authorized attacker with network access; the flaw allows injection of arbitrary scripts that execute in other users' browsers, enabling spoofing or credential theft. No public fix information is currently available.

## Affected products

- Microsoft Office SharePoint

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109497](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109497)

## Related threats

- [Microsoft Office SharePoint privilege escalation via missing authorization](https://junglewise.ai/threats/cve-2026-88176-missing-authorization-in-microsoft-office-sharepoint-allows-an)
- [Microsoft Office SharePoint XSS privilege escalation](https://junglewise.ai/threats/cve-2026-80095-improper-neutralization-of-input-during-web-page-generation-cross)
- [Microsoft Office SharePoint server-side request forgery](https://junglewise.ai/threats/cve-2026-124210-server-side-request-forgery-ssrf-in-microsoft-office-sharepoint)
- [Microsoft Office SharePoint privilege escalation via incorrect authorization](https://junglewise.ai/threats/cve-2026-123391-incorrect-authorization-in-microsoft-office-sharepoint-allows-an)
- [Microsoft Office SharePoint deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-123390-deserialization-of-untrusted-data-in-microsoft-office-sharepoint)