CVE-2026-33491
Zen-C has Stack-Based Buffer Overflow in Identifier Mangling
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.
INFO
Published Date :
March 26, 2026, 7:17 p.m.
Last Modified :
April 2, 2026, 6:22 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Zen C compiler to version 0.4.4.
- Apply security patches from vendor.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33491.
| URL | Resource |
|---|---|
| https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33491 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33491
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33491 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33491 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 02, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:z-libs:zen_c:*:*:*:*:*:*:*:* versions up to (excluding) 0.4.4 Added Reference Type GitHub, Inc.: https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CWE CWE-121 Added Reference https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr