CVE-2026-5759

A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 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 or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time.

CVSS 4.0

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-25)

CWEs

CWE-415, CWE-416

Published

2026-10-09

Modified

2026-10-13

Record from

the NVD, synced 2026-10-19

References

• https://github.com/FalkorDB/FalkorDB/commit/523d98ac7ffe99f11a9c95c258025c235f0dff4c
• https://github.com/FalkorDB/FalkorDB/pull/1843
• https://github.com/FalkorDB/FalkorDB/releases/tag/v4.18.1

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