CVE-2026-88406 Details
Description
FalkorDB (Redis module) v4.20.1 to v4.20.4 was discovered to contain a stack overflow in the _ValidateUnion_Clauses function (/ast/ast_validations.c). This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.
A stack overflow vulnerability has been identified in FalkorDB (Redis module) versions 4.20.1 through 4.20.4. The issue arises in the '_ValidateUnion_Clauses' function, where a variable-length array (VLA) is created on the stack based on the projection count from the parsed query. This vulnerability allows attackers to cause a denial-of-service (DoS) by sending a crafted input that exceeds the default thread stack limit, leading to a segmentation fault and process termination.
Users are advised to update to the latest version of FalkorDB where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 21, 2026CISA-ADP
Assessed Sep 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FalkorDB/FalkorDB/issues/2329 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| FalkorDB | >= 4.20.1, <= 4.20.4 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 22, 2026 | CVE Modified | CISA-ADP |
| Sep 21, 2026 | New CVE Received | [email protected] |