Time-of-check Time-of-use (TOCTOU) Race Condition

Overview Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition via a race condition in the /commonteams API endpoint. An attacker can gain unauthorized access to team names by exploiting the timing of channel membership validation during data retrieva...

CVE-2026-20796 Time-of-check time-of-use vulnerability in common teams API

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

CVE-2026-20796 Time-of-check time-of-use vulnerability in common teams API

Mattermost versions 10.11.x = 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /commonteams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549...

CVE-2026-21240

Time-of-check time-of-use toctou race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally...

CVE-2023-20548

A Time-of-check time-of-use TOCTOU race condition in the AMD Secure Processor ASP could allow an attacker to corrupt memory resulting in loss of integrity, confidentiality, or availability...

CVE-2023-31324

A Time-of-check time-of-use TOCTOU race condition in the AMD Secure Processor ASP could allow an attacker to modify External Global Memory Interconnect Trusted Agent XGMI TA commands as they are processed potentially resulting in loss of confidentiality, integrity, or availability...

CVE-2023-20548

A Time-of-check time-of-use TOCTOU race condition in the AMD Secure Processor ASP could allow an attacker to corrupt memory resulting in loss of integrity, confidentiality, or availability...

CVE-2023-20548

A Time-of-check time-of-use TOCTOU race condition in the AMD Secure Processor ASP could allow an attacker to corrupt memory resulting in loss of integrity, confidentiality, or availability...

PT-2026-7586

A Time-of-check time-of-use TOCTOU race condition in the AMD Secure Processor ASP could allow an attacker to corrupt memory resulting in loss of integrity, confidentiality, or availability...

CVE-2024-36311

A Time-of-check time-of-use TOCTOU race condition in the SMM communications buffer could allow a privileged attacker to bypass input validation and perform an out of bounds read or write, potentially resulting in loss of confidentiality, integrity, or availability...

CVE-2024-36311

A Time-of-check time-of-use TOCTOU race condition in the SMM communications buffer could allow a privileged attacker to bypass input validation and perform an out of bounds read or write, potentially resulting in loss of confidentiality, integrity, or availability...

CVE-2026-21523

Time-of-check time-of-use toctou race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network...

CVE-2026-21523

Time-of-check time-of-use toctou race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network...

CVE-2026-21240

Time-of-check time-of-use toctou race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally...

CVE-2026-21240

Time-of-check time-of-use toctou race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally...

CVE-2026-21240

Time-of-check time-of-use toctou race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally...

CVE-2026-21523

Time-of-check time-of-use toctou race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network...

Windows HTTP.sys Elevation of Privilege Vulnerability

Time-of-check time-of-use toctou race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally...

PT-2026-7344

Time-of-check time-of-use toctou race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally...

PT-2026-7406

Name of the Vulnerable Software and Affected Versions GitHub Copilot and Visual Studio affected versions not specified Visual Studio Code affected versions not specified Description A time-of-check time-of-use TOCTOU race condition exists in GitHub Copilot and Visual Studio. This condition arises...