Time-of-check Time-of-use (TOCTOU) Race Condition in BuildKit - CVE-2026-93315
Published: October 2, 2026
Vulnerability identifier: #VU153169
CSH Severity: Low
CVSS v4: 5.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93315
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition. A local user can manipulate the CA bundle during build steps to disrupt cleanup operations.
Affected software
BuildKit
How to mitigate CVE-2026-93315
Install updates from vendor's website.
BuildKit - update to 0.33.1