What’s Vulnerable › Vulnerabilities
CVE-2026-33491: Zen-C has Stack-Based Buffer Overflow in Identifier Mangling
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-03-26 · updated 2026-06-17
- Weakness: CWE-121
Description
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.
Affected products
- zenc-lang zenc: before 0.4.4 — fixed in 0.4.4
How to fix
Upgrade to a fixed version: zenc-lang zenc 0.4.4. Check the vendor advisory for mitigations.
References
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