CVE-2026-88406 FalkorDB Redis module - Denial of Service

FalkorDB Redis module v4.20.1 to v4.20.4 contains a stack overflow caused by improper validation in _ValidateUnion_Clauses function in /ast/ast_validations.c, letting attackers cause denial of service via crafted input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.46% 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:N/A:H
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to a version later than v4.20.4 or the latest available version.

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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