CVEvulnerability
CVE-2026-107909
8.8 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-10-09
- Last modified
- 2026-10-15
- Assigner
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c
- CVSS 4.0 (33c584b5-0579-4c06-b2a0-8d8329fcab9c)
- 8.8 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 (33c584b5-0579-4c06-b2a0-8d8329fcab9c)
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Weaknesses
- CWE-787
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.
Related
Weakness · CWE (1)
- CWE-787 Out-of-bounds Write weakness