CVE-2026-54341: CWE-125: Out-of-bounds Read in dragonflydb dragonfly
Dragonfly is an in-memory data store built for modern application workloads. Prior to 1.39.0, a crafted RESTORE payload triggers an out-of-bounds read in DragonflyDB's listpack collection loaders, crashing the entire server process (SIGSEGV). Because DragonflyDB requires no authentication by default and RESTORE is a normal keyspace command, an unauthenticated remote attacker can crash the server with a single ~24-byte command — a remote, repeatable denial of service. This vulnerability is fixed in 1.39.0.
AI Analysis
Technical Summary
CVE-2026-54341 is an out-of-bounds read vulnerability (CWE-125) in DragonflyDB's listpack collection loaders triggered by a crafted RESTORE payload. Prior to version 1.39.0, this vulnerability allows an unauthenticated remote attacker to cause a server crash (SIGSEGV) by sending a specially crafted ~24-byte RESTORE command, resulting in a repeatable denial of service. The vulnerability is resolved in DragonflyDB version 1.39.0.
Potential Impact
An unauthenticated remote attacker can cause a denial of service by crashing the DragonflyDB server process. There is no impact on confidentiality or integrity, but availability is fully impacted due to the server crash. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Upgrade DragonflyDB to version 1.39.0 or later, where this vulnerability is fixed. Until upgrading, consider restricting access to the RESTORE command or implementing authentication if possible to reduce exposure. Patch status is confirmed fixed in version 1.39.0.
CVE-2026-54341: CWE-125: Out-of-bounds Read in dragonflydb dragonfly
Description
Dragonfly is an in-memory data store built for modern application workloads. Prior to 1.39.0, a crafted RESTORE payload triggers an out-of-bounds read in DragonflyDB's listpack collection loaders, crashing the entire server process (SIGSEGV). Because DragonflyDB requires no authentication by default and RESTORE is a normal keyspace command, an unauthenticated remote attacker can crash the server with a single ~24-byte command — a remote, repeatable denial of service. This vulnerability is fixed in 1.39.0.
CVSS v3.1
Score 7.5high
Affected software
pkg:github/dragonflydb/dragonflyRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54341 is an out-of-bounds read vulnerability (CWE-125) in DragonflyDB's listpack collection loaders triggered by a crafted RESTORE payload. Prior to version 1.39.0, this vulnerability allows an unauthenticated remote attacker to cause a server crash (SIGSEGV) by sending a specially crafted ~24-byte RESTORE command, resulting in a repeatable denial of service. The vulnerability is resolved in DragonflyDB version 1.39.0.
Potential Impact
An unauthenticated remote attacker can cause a denial of service by crashing the DragonflyDB server process. There is no impact on confidentiality or integrity, but availability is fully impacted due to the server crash. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Upgrade DragonflyDB to version 1.39.0 or later, where this vulnerability is fixed. Until upgrading, consider restricting access to the RESTORE command or implementing authentication if possible to reduce exposure. Patch status is confirmed fixed in version 1.39.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-12T19:23:22.317Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3eb5316e08203f7dd21fc6
Added to database: 06/26/2026, 17:21:53 UTC
Last enriched: 06/26/2026, 17:36:50 UTC
Last updated: 06/26/2026, 18:33:18 UTC
Views: 4
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