Heap out-of-bounds read in FalkorDB BufferSerializerIOv2_ReadBuffer via crafted RDB
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.
CVE-2026-7826
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-7826
FalkorDB
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/FalkorDB/FalkorDB",
"vendor": "FalkorDB",
"modules": [
"RDB serializer / graph decoder"
],
"product": "FalkorDB",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.18.4",
"versionType": "semver"
}
],
"programFiles": [
"src/serializers/serializer_io.c"
],
"collectionURL": "https://github.com/FalkorDB/FalkorDB",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "BufferSerializerIOv2_ReadBuffer"
}
]
}
]- Related CVEs
- CVE-2026-7826
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #29187 · Revision 1
- Added to Heist Feed
- Publisher date