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CVE-2026-54341: Dragonfly: RESTORE operations may crash the server

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-10-25
• Weakness: CWE-125

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.

Affected products

• dragonflydb dragonfly: before 1.39.0

References

• https://github.com/dragonflydb/dragonfly/pull/7502
• https://github.com/dragonflydb/dragonfly/security/advisories/GHSA-cwjr-j869-h8q9
• https://github.com/dragonflydb/dragonfly/security/advisories/GHSA-cwjr-j869-h8q9

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