CVE-2026-114115

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{"bugzilla": {"description": "vyper: Vyper: Data corruption via miscompiled ternary array expressions", "id": "2558004", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558004"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-843", "details": ["Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parse_IfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing contracts to silently store corrupted values or revert.", "A flaw was found in Vyper. The compiler improperly calculates memory offsets when handling conditional (ternary) expressions that select between nested arrays with mismatched dimensions. A remote user interacting with an affected smart contract can trigger this condition, causing the contract to read incorrect memory locations and silently store corrupted data or unexpectedly fail."], "name": "CVE-2026-114115", "public_date": "2026-10-21T00:37:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-114115\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-114115\nhttps://github.com/vyperlang/vyper/commit/1fb7dfe2\nhttps://github.com/vyperlang/vyper/security/advisories/GHSA-cw3h-xwxq-8cx2\nhttps://www.vulncheck.com/advisories/vyper-0.3.8-through-0.5-0b1-memory-misread-via-ternary-nested-array-selection"], "statement": "This vulnerability is evaluated as Low severity for Red Hat because the affected Vyper compiler is not included or supported in any Red Hat enterprise offerings. The security risk is limited to smart contracts built with specific conditional nested array structures, requiring high attack complexity to trigger. Consequently, standard Red Hat environments are not affected by this flaw.", "threat_severity": "Low"}

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