Quick answers
- Is CVE-2026-88408 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88408 being exploited in the wild.
- How severe is CVE-2026-88408?
- Medium severity, with a CVSS score of 6.5, published 21 September 2026.
- Which products and versions are affected?
- FalkorDB 4.20.1 to 4.20.4.
- Is there a fix for CVE-2026-88408?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-88408 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-88408?
- Check whether you run FalkorDB at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack overflow exists in the _GetGroup() function in /ops/op_aggregate.c, triggered by unbounded stack variable-length allocation (VLA) sized by the aggregate key_count parameter. The vulnerability is reachable via crafted aggregate query input without authentication. An attacker can trigger a stack exhaustion leading to process crash and denial of service.
Affected products
- FalkorDB FalkorDB 4.20.1 to 4.20.4
Timeline
- 2026-09-21: disclosed