CVE-2026-7826
Heap out-of-bounds read in FalkorDB BufferSerializerIOv2_ReadBuffer via crafted RDB
FalkorDB FalkorDB
CVSS
8.8HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.43%Chance of exploitation activity in the next 30 days, higher than 36% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 4.18.4FalkorDBCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
A heap-based out-of-bounds read in the BufferSerializerIOv2_ReadBuffer function (src/serializers/serializer_io.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 or disclose heap memory by supplying a crafted RDB stream whose sub-buffer length field exceeds the remaining buffer size. The only bounds check is an ASSERT(), which is compiled out in release builds, so memcpy() reads past the end of the heap allocation.
Text from CVE List
Affected versions 1
- FalkorDBaffected: all versions before 4.18.4CVE List