Observable discrepancy in Microsoft SharePoint Server Subscription Edition - CVE-2026-97782
Published: October 14, 2026
Vulnerability identifier: #VU155781
CSH Severity: Low
CVSS v4: 7.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97782
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to alter trusted application state and cause unauthorized backend actions.
The vulnerability exists due to an observable discrepancy in Microsoft SharePoint forms when processing submitted session data. A remote user can submit specially crafted session data through an affected form to alter trusted application state and cause unauthorized backend actions.
Successful exploitation requires a deep understanding of the system and manipulation of its components to trigger a specific condition. User interaction is not required.
Affected software
Microsoft SharePoint Server Subscription Edition
How to mitigate CVE-2026-97782
Install security update from vendor's website.