CVE-2026-107909 FalkorDB - Denial of Service

FalkorDB < 4.20.0 contains a heap-based out-of-bounds write caused by improper bounds checking in ws_read_frame and buffer_apply_mask functions, letting remote unauthenticated attackers cause denial of service and heap corruption by sending crafted WebSocket frames, exploit requires Bolt endpoint enabled.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to version 4.20.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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