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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00485.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
dragonflydb dragonfly unaffected
Version Status Constraints
0 affected ≤ 2.0.2

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Project Subscriptions

Vendors Products
Dragonflydb Subscribe
Dragonfly Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/dragonflydb/dragonfly cve-icon cve-icon
https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/hset_family.cc#L1436-L1483 cve-icon cve-icon
https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/set_family.cc#L957-L984 cve-icon cve-icon
https://github.com/dragonflydb/dragonfly/blob/8ce4bbb106586057fbd85f71ed353c60d0d5bf87/src/server/zset_family.cc#L1519-L1522 cve-icon cve-icon
https://github.com/dragonflydb/dragonfly/issues/8578 cve-icon cve-icon
https://www.vulncheck.com/advisories/dragonfly-through-2.0.2-unbounded-memory-allocation-via-negative-count-in-hrandfield-zrandmember-and-srandmember cve-icon cve-icon
History

Thu, 15 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title Dragonfly through 2.0.2 Unbounded Memory Allocation via Negative COUNT in HRANDFIELD, ZRANDMEMBER and SRANDMEMBER
First Time appeared Dragonflydb
Dragonflydb dragonfly
Weaknesses CWE-789
CPEs cpe:2.3:a:dragonflydb:dragonfly:*:*:*:*:*:*:*:*
Vendors & Products Dragonflydb
Dragonflydb dragonfly
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-16T19:43:45.103Z

Reserved: 2026-10-15T19:46:06.408Z

Link: CVE-2026-111279

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-15T22:19:29.157

Modified: 2026-10-16T20:17:19.980

Link: CVE-2026-111279

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T16:15:07Z

Weaknesses