MEDIUM 6.3 NVD
CVE-2026-114115
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
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.
References
- https://github.com/vyperlang/vyper/commit/1fb7dfe2
- https://github.com/vyperlang/vyper/security/advisories/GHSA-cw3h-xwxq-8cx2
- https://www.vulncheck.com/advisories/vyper-0.3.8-through-0.5-0b1-memory-misread-via-ternar
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-10-21 via NVD.
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