Out-of-bounds Read in Falkordb
CVE-2026-7826
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (patch)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (patch)
- 33c584b5-0579-4c06-b2a0-8d8329fcab9c (release-notes)
Frequently asked questions
- What is CVE-2026-7826?
- CVE-2026-7826 is a critical-severity vulnerability in Falkordb, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-10-09.
- How severe is CVE-2026-7826?
- Critical severity. CVSS v3 base score is 9.1 out of 10.