CVE-2026-26129
M365 Copilot Information Disclosure Vulnerability
- State
- Published
- Severity
- 7.5 High
- Published
- May 7, 2026
- Updated
- Aug 10, 2026
- Reserved
- Feb 11, 2026
Description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C | microsoft |
Weaknesses
- CWE-138 Improper Neutralization of Special Elements
Affected Products
| Product | Versions |
|---|---|
Microsoft 365 Copilot's Business ChatMicrosoft |
|
References
- M365 Copilot Information Disclosure Vulnerabilityvendor-advisorypatch
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.