CVE-2026-33491CWE-121CWE-787

Zen-C has Stack-Based Buffer Overflow in Identifier Mangling

High · published March 26, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
8.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00195 · 8.7th percentile
Weaknesses
CWE-121 · Stack-based Buffer Overflow; CWE-787 · Out-of-bounds Write
Published
2026-03-26T18:39Z
EPSS history
Timeline
  • 26 MAR 18:39Z
    Zen-C has Stack-Based Buffer Overflow in Identifier Mangling
    cvelistv5