High severity7.5NVD Advisory· Published May 7, 2026· Updated May 8, 2026
CVE-2026-26129
CVE-2026-26129
Description
Improper neutralization of special elements in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Affected products
1- cpe:2.3:a:microsoft:365_copilot_chat:-:*:*:*:*:*:*:*
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26129nvdVendor Advisory
News mentions
1- Patch Tuesday - May 2026Rapid7 Blog · May 13, 2026