Heap-based buffer overflow in Open VKL - CVE-2026-21399
Published: August 14, 2026
Vulnerability identifier: #VU142470
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-21399
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error. A local user can trigger a heap-based buffer overflow and cause a denial of service condition on the target system.
Affected software
Open VKL
How to mitigate CVE-2026-21399
Install updates from vendor's website.
Open VKL - update to 2.0.2