CVE-2026-86227lowCWE-119CWE-125

CVE-2026-86227: low-severity vulnerability in valkey-io valkey

valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds

Published · Updated

Follow this CVE+ Monitor valkey+ Monitor valkey

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 2.3epss 0.5%
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."
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
valkey-io · valkey
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — valkey-io valkey

In the same product, most dangerous first.

CVE-2026-63639HIGHValkey: UAF in stream deserialization may lead to remote code executionEPSS 0.9%CVE-2026-85522MEDIUMvalkey-io valkey Slot Migration cluster_migrateslots.c createSlotImportJob out-of-boundsEPSS 0.9%CVE-2026-21863HIGHMalformed Valkey Cluster bus message can lead to Remote DoSEPSS 0.8%CVE-2025-67733HIGHValkey Affected by RESP Protocol Injection via Lua error_replyEPSS 0.6%CVE-2026-56684HIGHValkey: TLS pending-data processing use-after-free may allow remote code executionEPSS 0.5%CVE-2026-27623HIGHValkey has Pre-Authentication DOS from malformed RESP requestEPSS 0.4%