CVE-2025-46819 Redis is vulnerable to DoS via specially crafted LUA scripts
An authenticated attacker can crash the Redis server or read out-of-bound data using a specially crafted Lua script, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-46819?
CVE-2025-46819 is a medium-severity denial of service vulnerability in redis, published on 3 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted LUA script to read out-of-bound data or crash the server and subsequent denial of service. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to block a script by restricting both the EVAL and FUNCTION command families.
Which versions are affected by CVE-2025-46819?
3 open source packages ship an affected version, including redis, keydb and valkey. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
redis Bitnami | All versions | 6.2.20, 7.2.11, 7.4.6, 8.0.4, 8.2.2 |
keydb Bitnami | All versions | 6.2.20, 7.2.11, 7.4.6, 8.0.4, 8.2.2 |
valkey Bitnami | All versions | 7.2.11, 8.0.6, 8.1.4 |
Products include Redis Redis.
How do I fix CVE-2025-46819?
Upgrade redis to a fixed version for your release line: 6.2.20, 7.2.11, 7.4.6 or 8.0.4.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-46819 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-46819 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Other vulnerabilities in redis
- CVE-2022-0543 Debian-specific Redis Server Lua Sandbox Escape
- CVE-2026-23479 redis-server use-after-free in unblock client flow may allow remote code execution
- CVE-2026-25243 redis-server RESTORE invalid memory access may allow remote code execution
- CVE-2025-62507 Redis: Bug in XACKDEL may lead to stack overflow and potential RCE
- CVE-2025-48367 Redis DoS Vulnerability due to bad connection error handling
Sources
Also known as ALPINE-CVE-2025-46819, AZL-68244, AZL-68355, AZL-68360, BELL-CVE-2025-46819, BIT-keydb-2025-46819 and 11 more.