Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N H N L N N N L 1.3 .0052 42.4 —
AFFECTED Product Versions Fixed valkey 9.0.0 – —
TIMELINE Sep 6 Reserved by VulDB Sep 6 Published (CNA: VulDB) Sep 9 EXPLOIT PUBLISHED — CVE-2026-86227 (valkey-io valkey). Public exploit reference added.
A weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1. This affects the function kvstoreGetHashtable of the file src/kvstore.c. This manipulation of the argument didx causes out-of-bounds read. It is possible to initiate the attack remotely. The attack is considered to have high complexity. It is indicated that the exploitability is difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 4691888e7fab3df128f0bde5750c9fde2ae552fa. To fix this issue, it is recommended to deploy a patch. Exploitation requires cluster mode plus attacker-controlled dump.rdb at startup (data-dir write access, replication feed, or a stored crafted RDB) - an attacker-position DoS at boot, not network pre-auth. The issue report was closed stating it "is worth fixing for the sake of memory safety… but I don't think it meets our bar for a security disclosure."
| Date | Event | Detail |
|---|---|---|
| September 6, 2026 | Reserved | Reserved by VulDB |
| September 6, 2026 | Published | Published (CNA: VulDB) |
| September 9, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-86227 (valkey-io valkey). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| valkey-io | valkey | — | 9.0.0 | — |
Authoritative record: CVE-2026-86227 at cve.org
Vendors: valkey-io
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86227 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
