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CVE-2026-18022 is an integer wraparound vulnerability in the IVFFlat index build logic of pgvector affecting versions before 0.8.6. On 32-bit systems, arithmetic performed during IVFFlat index creation can wrap, leading to incorrect size or offset calculations and enabling an out-of-bounds write. A database user with the ability to create an IVFFlat index can trigger the flaw. The memory corruption condition may result in arbitrary code execution within the database process context.
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An integer wraparound vulnerability in pgvector's IVFFlat index-building functionality affects versions before 0.8.6 on 32-bit systems. A database user can cause out-of-bounds writes, potentially leading to arbitrary code execution. The reported CVSS v3 base score is 8.8. Updating pgvector and related packages to version 0.8.6 or later fixes the vulnerability.
An integer wraparound and out-of-bounds write vulnerability in pgvector's IVFFlat index build process affecting versions before 0.8.6 on 32-bit systems, potentially leading to arbitrary code execution.
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