What is CVE-2026-104192?

CVE-2026-104192 is a critical-severity vulnerability in Dragonflydb Dragonfly, classified under Double Free. CVSS score: 9.6/10. Published 2026-10-13.

How severe is CVE-2026-104192?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Double Free in Dragonflydb Dragonfly

CVE-2026-104192

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.

Vulnerability class: Double Free

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Dragonflydb Dragonfly — versions < 1.40

Weakness classification (CWE)

CWE-415 — Double Free

References

Frequently asked questions

What is CVE-2026-104192?: CVE-2026-104192 is a critical-severity vulnerability in Dragonflydb Dragonfly, classified under Double Free. CVSS score: 9.6/10. Published 2026-10-13.
How severe is CVE-2026-104192?: Critical severity. CVSS v3 base score is 9.6 out of 10.