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Heap overflow in Redis Lua cjson library in Apache Kvrocks

IdentifiersCVE-2026-46752CWE-122

CVE-2026-46752 is a memory-corruption vulnerability in Apache Kvrocks affecting versions 2.0.4 through 2.15.0. The available description identifies the issue as a Redis Lua heap overflow in the cjson library. Supporting context also references a stack buffer overflow in Lua bit.tohex(), indicating inconsistent public wording around the precise vulnerable component, but the common theme is unsafe memory handling within Kvrocks' embedded Redis Lua functionality. Successful exploitation could lead to corruption of process memory in the Kvrocks server.

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Impact, mitigation & remediation

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Impact

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The vulnerability is described as remotely exploitable and carries a critical CVSS 4.0 score of 10.0. Based on the provided context, exploitation can cause memory corruption in the Kvrocks process and may result in complete compromise of confidentiality, integrity, and availability of the vulnerable system. The supplied CVSS context also indicates high impact to subsequent systems, so successful exploitation may enable broader compromise beyond the directly affected Kvrocks instance.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, reduce exposure of Kvrocks instances to untrusted network sources, restrict access to interfaces that can reach Redis Lua functionality, and limit or disable use of untrusted Lua scripting paths where operationally feasible. Because the issue is remotely exploitable and no specific workaround is provided in the supplied content, mitigation should be treated only as temporary risk reduction until upgrade to 2.16.0 is completed.

Remediation

Patch, then assume compromise.

Upgrade Apache Kvrocks to version 2.16.0. The provided advisory states that version 2.16.0 fixes the issue. Standard remediation practice is to deploy the vendor-fixed release across all affected instances running versions 2.0.4 through 2.15.0 and verify that no vulnerable nodes remain in service.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

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