Redis is generally backward compatible with very few exceptions, so we recommend users to always use the latest version to experience stability, performance and security.

We generally backport security issues to a single previous major version, unless this is not possible or feasible with a reasonable effort.

If you believe you've discovered a serious vulnerability, please contact the Redis core team at redis@redis.io. We will evaluate your report and if necessary issue a fix and an advisory. If the issue was previously undisclosed, we'll also mention your name in the credits.

In some cases, we may apply a responsible disclosure process to reported or otherwise discovered vulnerabilities. We will usually do that for a critical vulnerability, and only if we have a good reason to believe information about it is not yet public.

This process involves providing an early notification about the vulnerability, its impact and mitigations to a short list of vendors under a time-limited embargo on public disclosure.

If you believe you should be on the list, please contact us and we will consider your request based on the above criteria.

Redis is primarily tested on modern Linux distributions, using contemporary Intel and AMD x86_64 CPUs, as well as ARM-based CPUs, and recent versions of the GCC compiler. Vulnerability reports that rely on unsupported or uncommon environments (for example, 32-bit architectures, non-Linux operating systems, or outdated toolchains) may be considered out of scope, even if the issue is technically valid. Such reports will be evaluated on a case-by-case basis at our discretion.

For security vulnerability patches released under Redis Open Source 7.4 and thereafter, Redis permits users of earlier versions (7.2 and prior) to access patches under the BSD3 license noted in REDISCONTRIBUTIONS.txt instead of the full license requirements described in LICENSE.txt. Security fixes are tested only against the specific versions for which they are provided. Applicability or portability to other versions or forks has not been evaluated.