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.
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Workaround
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References
History
Wed, 21 Oct 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Vyper 0.3.8 through 0.5.0b1 Memory Misread via Ternary Nested Array Selection | |
| First Time appeared |
Vyperlang
Vyperlang vyper |
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| Weaknesses | CWE-843 | |
| CPEs | cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vyperlang
Vyperlang vyper |
|
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-21T00:37:13.251Z
Reserved: 2026-10-20T21:48:58.503Z
Link: CVE-2026-114115
No data.
Status : Received
Published: 2026-10-21T01:17:37.787
Modified: 2026-10-21T01:17:37.787
Link: CVE-2026-114115
No data.
OpenCVE Enrichment
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Weaknesses