SB2026090227 - Incorrect authorization in Fleet Server
Published: September 2, 2026
Security Bulletin ID
SB2026090227
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect authorization (CVE-ID: CVE-2026-78587)
CWE-ID: CWE-863 - Incorrect Authorization
CVSSv4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to cause a denial of service of agent upload operations.
The vulnerability exists due to incorrect authorization in Fleet Server multi-part data upload operations when verifying session ownership during uploads. A remote user can interfere with active upload sessions belonging to other enrolled agents to cause a denial of service of agent upload operations.
All configurations are affected.
Remediation
Install update from vendor's website.