Creation of temporary file in directory with insecure permissions in Aspire.Cli - CVE-2026-120778
Published: November 11, 2026
Vulnerability identifier: #VU165430
CSH Severity: Medium
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-120778
CWE-ID: CWE-379
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges and execute code with another user's permissions on the affected system.
The vulnerability exists due to creation of temporary files in a directory with insecure permissions in .NET Aspire's Aspire.Cli when handling temporary files. A local user can exploit this insecure temporary-file handling, with user interaction, to execute code with another user's permissions and access data and resources available to that user.
Affected software
Aspire.Cli
How to mitigate CVE-2026-120778
Install security update from vendor's website.
Aspire.Cli - update to 13.6.5