CVE-2026-33491 json
Zen-C has Stack-Based Buffer Overflow in Identifier Mangling
published 2026-03-26 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-16319
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- zenc-lang zen_c 0.4.4
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- zenc-lang zenc
Classification
References
-
github.com
/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr
exploit, mitigation, vendor-advisory
Sources
- CVE List CVE-2026-33491
- NVD CVE-2026-33491
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