---
title: "Dragonfly - Denial of Service"
description: "Dragonfly 2.0.2 contains an unbounded memory allocation vulnerability caused by passing a negative COUNT to HRANDFIELD, ZRANDMEMBER, or SRANDMEMBER commands, letting unauthenticated clients cause denial of service by exhausting memory."
url: https://panop.io/threat-heartbeat/CVE-2026-111279/
---

# CVE-2026-111279 Dragonfly - Denial of Service

Dragonfly 2.0.2 contains an unbounded memory allocation vulnerability caused by passing a negative COUNT to HRANDFIELD, ZRANDMEMBER, or SRANDMEMBER commands, letting unauthenticated clients cause denial of service by exhausting memory.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111279)

## Details

Type

Undefined

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

15 October 2026

Updated

16 October 2026

Weakness

[CWE-789](https://cwe.mitre.org/data/definitions/789.html)

## Vendor fix

Update to the latest version of Dragonfly.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111279](https://nvd.nist.gov/vuln/detail/CVE-2026-111279)
- [https://www.vulncheck.com/advisories/dragonfly-through-2.0.2-unbounded-memory-allocation-via-negative-count-in-hrandfield-zrandmember-and-srandmember](https://www.vulncheck.com/advisories/dragonfly-through-2.0.2-unbounded-memory-allocation-via-negative-count-in-hrandfield-zrandmember-and-srandmember)
- [https://github.com/dragonflydb/dragonfly](https://github.com/dragonflydb/dragonfly)
- [https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/hset\_family.cc#L1436-L1483](https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/hset_family.cc#L1436-L1483)
- [https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/set\_family.cc#L957-L984](https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/set_family.cc#L957-L984)
- [https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/zset\_family.cc#L1519-L1522](https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/zset_family.cc#L1519-L1522)
- [https://github.com/dragonflydb/dragonfly/issues/8578](https://github.com/dragonflydb/dragonfly/issues/8578)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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