$regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars
Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.
cve-program · CVE-2026-82052
PublishedThe $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the regex match can start in the middle of a multi-code-unit character, triggering an assertion during query execution.
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CVE-2026-82052 · CVE overview and exploitation status
cve-program · CVE-2026-82052
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