Dragonfly: RESP Protocol Injection via Lua redis.error_reply() in EvalSerializer
Priority MEDIUM 45CWE-116Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
Dragonfly is an in-memory data store built for modern application workloads. Prior to 1.39.9, Dragonfly has a RESP Protocol Injection via Lua redis.error_reply() in EvalSerializer. An authenticated user can inject arbitrary RESP messages into the connection's response stream, potentially causing response desynchronization in connection-pool clients. This vulnerability is fixed in 1.39.9.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0036 29th percentileScored 2026-11-07
Fix Fixed dragonfly (dragonflydb): 1.38.9
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| dragonflydb | dragonfly | before 1.38.9 | 1.38.9 | Patch available | CNA |
- dragonfly Vendordragonflydb Affected before 1.38.9 Fixed in 1.38.9 Patch available CNA
Remediation
- Fix · CNA dragonfly (dragonflydb) Fixed in 1.38.9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-47206
References
More dragonflydb vulnerabilities
- TI-2026-75060 Unbounded memory allocation in Dragonfly via negative COUNT values CVSS 4.0HIGH 8.7
- TI-2026-44509 DragonflyDB `CMS.INITBYDIM` integer overflow leads to a remote, attacker-controlled heap out-of-bounds write CVSS 4.0HIGH 8.8
- TI-2026-39235 Dragonfly: RESTORE operations may crash the server CVSS 3.1HIGH 7.5
- TI-2025-19279 DragonflyDB Dragonfly before 1.27.0 allows authenticated users to cause a denial of… CVSS 3.1MEDIUM 6.5
- TI-2025-19280 Integer underflow in dragonflydb Dragonfly CVSS 3.1MEDIUM 5.5
- TI-2026-71838 Double free in DragonflyDB stream RDB deserialization CVSS 3.1CRITICAL 9.6
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences