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TI-2026-44509 Aliases CVE-2026-62357

DragonflyDB `CMS.INITBYDIM` integer overflow leads to a remote, attacker-controlled heap out-of-bounds write

Priority HIGH 77CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00524 44th percentileScored 2026-11-07
Fix Fixed dragonfly (dragonflydb): 1.40.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
dragonflydbdragonflybefore 1.40.01.40.0Patch availableCNA
  • dragonfly Vendordragonflydb Affected before 1.40.0 Fixed in 1.40.0 Patch available CNA

Remediation

  • Fix · CNA dragonfly (dragonflydb) Fixed in 1.40.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-62357

References

Other 4

  • TI-2026-75060 Unbounded memory allocation in Dragonfly via negative COUNT values CVSS 4.0HIGH 8.7
  • TI-2026-39235 Dragonfly: RESTORE operations may crash the server CVSS 3.1HIGH 7.5
  • TI-2025-19279 DragonflyDB Dragonfly before 1.27.0 allows authenticated users to cause a denial of… CVSS 3.1MEDIUM 6.5
  • TI-2025-19280 Integer underflow in dragonflydb Dragonfly CVSS 3.1MEDIUM 5.5
  • TI-2026-34794 Dragonfly: RESP Protocol Injection via Lua redis.error_reply() in EvalSerializer CVSS 4.0LOW 2.3
  • TI-2026-71838 Double free in DragonflyDB stream RDB deserialization CVSS 3.1CRITICAL 9.6
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences