What’s Vulnerable › Vulnerabilities

CVE-2026-7827: Stack-based buffer overflow in FalkorDB _RdbLoadEntity via unbounded property count in crafted RDB

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-09
• Weakness: CWE-121

Description

A stack-based buffer overflow in the _RdbLoadEntity function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.4 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service and possibly execute arbitrary code by supplying a crafted RDB stream with an attacker-controlled entity property count. The count sizes two variable-length arrays on the thread stack with no upper bound, and the decoder then fills them with attacker-supplied values.

Affected products

• FalkorDB: before 4.18.4 — fixed in 4.18.4

How to fix

Upgrade to a fixed version: FalkorDB 4.18.4. Check the vendor advisory for mitigations.

References

• https://github.com/FalkorDB/FalkorDB/commit/7d15431aadf37588fadc2578b90c3afb5e8daa94
• https://github.com/FalkorDB/FalkorDB/pull/1973
• https://github.com/FalkorDB/FalkorDB/releases/tag/v4.18.4

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