---
id: CVE-2026-62357
title: Dragonfly is an in-memory data store built for modern application workloads
summary: >-
  Dragonfly is an in-memory data store built for modern application workloads.
  Prior to 1.40.0, CMS.INITBYDIM and CMS.INITBYPROB accept dimensions whose
  width times depth times sizeof(int64_t) overflows in src/core/cms.cc,
  allocating an un…
severity: none
cwe:
  - CWE-190
published: '2026-08-18'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T21:18:16.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62357'
references:
  - url: >-
      https://github.com/dragonflydb/dragonfly/commit/c004623249fe2151dc5d64e21364fb9fb07c90d3
    label: security-advisories@github.com
  - url: 'https://github.com/dragonflydb/dragonfly/pull/7647'
    label: security-advisories@github.com
  - url: 'https://github.com/dragonflydb/dragonfly/releases/tag/v1.40.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/dragonflydb/dragonfly/security/advisories/GHSA-cmmv-h748-v93x
    label: security-advisories@github.com
  - url: >-
      https://github.com/dragonflydb/dragonfly/security/advisories/GHSA-cmmv-h748-v93x
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00524
epssPercentile: 0.41912
ingestedAt: '2026-09-10T22:07:00.625Z'
---

## Overview

Dragonfly is an in-memory data store built for modern application workloads. Prior to 1.40.0, CMS.INITBYDIM and CMS.INITBYPROB accept dimensions whose width times depth times sizeof(int64_t) overflows in src/core/cms.cc, allocating an undersized counter buffer while CMS.INCRBY and CMS.QUERY use the unbounded dimensions, which allows an unauthenticated remote client to corrupt or disclose adjacent heap memory and crash the server. This issue is fixed in version 1.40.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.