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CVE-2026-33491

HIGH CVSS 3.1: 7.8 EPSS 0.01%
Updated Mar 30, 2026
Zen
Parameter Value
CVSS 7.8 (HIGH)
Type CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)
Vendor Zen
Public PoC No

Zen C is a systems programming language that compiles to human-readable GNU C/C11. Prior to version 0.4.4, a stack-based buffer overflow vulnerability in the Zen C compiler allows attackers to cause a compiler crash or potentially execute arbitrary code by providing a specially crafted Zen C source file (`.zc`) with excessively long struct, function, or trait identifiers. Users are advised to update to Zen C version v0.4.4 or later to receive a patch.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1