Vulnerability · Published Oct 13, 2026 · Assigned by GitHub_M
CVE-2026-104192DragonflyDB stream RDB deserialization double-free
Critical 9.6
In plain English
A critical-severity double free in dragonfly from dragonflydb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Official description
Dragonfly is an in-memory data store built for modern application workloads. Prior to 1.40, OpaqueObjLoader::CreateStream in src/server/rdb_load.cc can associate one streamNACK with a consumer group's global PEL and a consumer-local PEL, then free the shared object when a duplicate consumer entry is rejected. Cleanup subsequently frees the same object again. In the default configuration, where Dragonfly ships with authentication disabled, an unauthenticated client can trigger the double-free by sending a crafted serialized stream to RESTORE, causing allocator corruption, denial of service, and potentially attacker-controlled code execution as the Dragonfly service account. The source fix has not yet been mapped to a published release.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| dragonflydb | dragonfly | < 1.40 |
Weakness: CWE-415 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H