CVE-2026-107909

9.1 CRITICALpublic exploit available

Published 2026-10-09 · Updated 2026-10-09

AI risk analysis

Summary: This flaw allows a remote attacker to cause a denial of service and potentially corrupt heap memory by sending a malicious WebSocket frame, impacting deployments that have the Bolt endpoint enabled.
Exploitability: Exploitation is moderately hard as it requires sending a specific WebSocket frame, but the lack of a bounds check in release builds makes it feasible for skilled attackers.
Blast radius: The impact is significant as it can lead to a denial of service and possibly data corruption, affecting services that rely on the Bolt endpoint.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to FalkorDB 4.20.0 or later to mitigate the risk.

dosheap-corruptionweb-socketremote-exploit

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

A heap-based out-of-bounds write in the ws_read_frame function (src/bolt/ws.c) and the buffer_apply_mask function (src/bolt/buffer.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly corrupt heap memory by sending a WebSocket frame with a 64-bit extended payload length to the Bolt port. The payload length is not bounded, and the only bounds check in buffer_apply_mask is an ASSERT(), which is compiled out in release builds, so the function XORs memory beyond the end of the receive buffer with the attacker-supplied mask key. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Weaknesses

CWE-787

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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