CVE-2026-111279 Dragonfly through 2.0.2 Unbounded Memory Allocation via Negative COUNT in HRANDFIELD, ZRANDMEMBER and SRANDMEMBER
Unauthenticated attackers can crash the Dragonfly database by sending commands with negative COUNT values, causing memory exhaustion.
- 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-2026-111279?
CVE-2026-111279 is a high-severity denial of service vulnerability in dragonflydb dragonfly, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Dragonfly through 2.0.2 contains an unbounded memory allocation vulnerability that allows unauthenticated clients to exhaust memory by passing a negative COUNT to HRANDFIELD, ZRANDMEMBER or SRANDMEMBER. Attackers can send a single command against a one-element key with a huge negative COUNT to trigger the OOM killer, terminating the instance for all clients.
Weakness: CWE-789
Which versions are affected by CVE-2026-111279?
How do I fix CVE-2026-111279?
No fix has been published for CVE-2026-111279 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-111279 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111279 exists.
Sources
Also known as GHSA-w5x4-fq2q-m366.