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CVE-2026-56684VulnerabilityPublished 09/17/2026Updated 09/21/2026

Red Hat Security Advisory: valkey security update

Affects Red Hat Product Security Red HatSource GCVE Database

Severity
High

No CVSS score published yet

Exploitation

Not in CISA KEV, no exploitation reported

EPSS
0.9% chance of exploitation in 30 days – higher than 58% of CVEs

What to do

AI-suggested

Red Hat has released an update rebasing Valkey to version 8.0.10 that addresses these remote code execution vulnerabilities. Users should apply this update promptly to remediate the issues. For detailed update instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patch.

Affected software

ProductAffectedFixed in
Red Hatredhat/valkeypkg:rpm/redhat/valkeyOther threatsAffected
  • >=9 <9.8
Fixed in–

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Description

Valkey is an advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set. In order to achieve its outstanding performance, Valkey works with an in-memory dataset. Depending on your use case, you can persist it either by dumping the dataset to disk every once in a while, or by appending each command to a log. Valkey also supports trivial-to-setup master-slave replication, with very fast non-blocking first synchronization, auto-reconnection on net split and so forth. Other features include Transactions, Pub/Sub, Lua scripting, Keys with a limited time-to-live, and configuration settings to make Valkey behave like a cache. You can use Valkey from most programming languages also. Security Fix(es): * redis: Redis: Remote Code Execution via specially crafted RESTORE payload (CVE-2026-66373) * valkey: Valkey: Remote code execution via use-after-free in stream deserialization (CVE-2026-63639) * valkey: Valkey: Remote code execution via TLS pending-data processing use-after-free (CVE-2026-56684) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Weaknesses

References

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Added 09/08/2026 · analysed 09/08/2026 · updated 10/24/2026