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Vulnerability record · CVE-2026-33491 · published 26 March 2026

CVE-2026-33491: Zenc-lang zen c stack-based buffer overflow vulnerability

ZZenc Lang · Zen C

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.

7.8 CVSS 3.1 High EPSS 0.19% · top 91.8% CWE-121 · Stack-based buffer overflowCWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr ExploitMitigationVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-33491), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.