FalkorDB up to 4.18.3 RDB Graph Decoder decode_graph_entities.c _RdbLoadEntity stack-based overflow

Summaryinfo

A vulnerability classified as critical has been found in FalkorDB up to 4.18.3. This vulnerability affects the function _RdbLoadEntity of the file decode_graph_entities.c of the component RDB Graph Decoder. The manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2026-7827. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in FalkorDB up to 4.18.3 and classified as critical. This issue affects the function _RdbLoadEntity of the file decode_graph_entities.c of the component RDB Graph Decoder. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-7827 since 05/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.18.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-95474). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• FalkorDB

Version

• 4.18.0
• 4.18.1
• 4.18.2
• 4.18.3

Website

• Product: https://github.com/FalkorDB/FalkorDB/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion