CVE-2026-21863Valkey is a distributed key-value database.
Updated under an hour ago ()
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Valkey is a distributed key-value database. Prior to versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12, a malicious actor with access to the Valkey clusterbus port can send an invalid packet that may cause an out bound read, which might result in the system crashing. The Valkey clusterbus packet processing code does not validate that a clusterbus ping extension packet is located within buffer of the clusterbus packet before attempting to read it. Versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12 fix the issue. As an additional mitigation, don't expose the cluster bus connection directly to end users, and protect the connection with its own network ACLs.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
lfprojects valkey lfprojects:valkey | before 7.2.12; from 8.0.0 before 8.0.7; from 8.1.0 before 8.1.6; from 9.0.0 before 9.0.2 | NVD |
References
- https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggqvendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3443
- https://access.redhat.com/errata/RHSA-2026:3507
- https://access.redhat.com/errata/RHSA-2026:5445
- https://access.redhat.com/errata/RHSA-2026:8753
- https://access.redhat.com/security/cve/CVE-2026-21863
- https://bugzilla.redhat.com/show_bug.cgi?id=2442026
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21863.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.