Out-of-Bounds Read Vulnerability in Valkey Software by Valkey-IO
CVE-2026-86227

2.3LOW

Key Information:

Vendor

Valkey-io

Status
Valkey
Vendor
CVE Published:
6 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86227?

A weakness has been found in Valkey software, specifically within the kvstoreGetHashtable function of the src/kvstore.c file. This vulnerability allows an attacker to manipulate the 'didx' argument, leading to an out-of-bounds read, which could potentially reveal sensitive information. Remote exploitation is possible under specific conditions, such as requiring cluster mode and controlled access to the dump.rdb file at startup, making this attack complex. Although an exploit has been publicized, the reported issue emphasizes that fixing this vulnerability is essential for maintaining memory safety, despite its classification not reaching the threshold for a formal security disclosure.

Affected Version(s)

valkey 9.0.0

valkey 9.0.1

valkey 9.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-86227 - Proof of Concept

References

https://vuldb.com/vuln/399380
vdb-entrytechnical-description
https://vuldb.com/vuln/399380/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86227
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

VULL (VulDB User)
VulDB CNA Team
.