{"id":"CVE-2026-33491","state":"PUBLISHED","title":"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.","publishedAt":"2026-03-26T18:39:55.093Z","updatedAt":"2026-03-27T03:55:39.895Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["zenc-lang zenc"],"affected":[{"vendor":"zenc-lang","product":"zenc","versions":[{"version":"< 0.4.4","status":"affected"}]}],"references":["https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr"],"weaknesses":["CWE-121","CWE-787"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33491.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33491","state":"PUBLISHED","datePublished":"2026-03-26T18:39:55.093Z","dateUpdated":"2026-03-27T03:55:39.895Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-20T16:16:48.971Z"},"containers":{"cna":{"title":"Zen-C has Stack-Based Buffer Overflow in Identifier Mangling","descriptions":[{"lang":"en","value":"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":[{"vendor":"zenc-lang","product":"zenc","versions":[{"version":"< 0.4.4","status":"affected"}]}],"references":[{"url":"https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr","name":"https://github.com/zenc-lang/zenc/security/advisories/GHSA-rv74-w6q7-h8xr","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"CWE-121: Stack-based Buffer Overflow","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-26T18:39:55.093Z"},"source":{"advisory":"GHSA-rv74-w6q7-h8xr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-26T00:00:00+00:00","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-33491"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-27T03:55:39.895Z"}}]}}}