CVE-2026-107908 Pre-authentication heap out-of-bounds write in FalkorDB Bolt BoltReadHandler via RESET message
Remote unauthenticated attackers can cause denial of service or execute code via heap overflow in FalkorDB's Bolt protocol when enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107908?
CVE-2026-107908 is a critical memory corruption vulnerability in FalkorDB, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A heap-based out-of-bounds write in the BoltReadHandler function (src/bolt/bolt_api.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly execute arbitrary code by sending a Bolt RESET message with an attacker-chosen chunk size to the Bolt port. The handler checks the size only with ASSERT(), which is compiled out in release builds, then computes a destination pointer from the wire-supplied 16-bit size and moves buffered data up to about 64 KiB backwards past the start of the read buffer. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.
Weakness: CWE-787
Which versions are affected by CVE-2026-107908?
How do I fix CVE-2026-107908?
No fix has been published for CVE-2026-107908 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-107908 being exploited?
There is no known exploitation of CVE-2026-107908 in the wild and no public exploit code.
Sources
Also known as GHSA-jpx9-94mp-7xhq.