Out-of-Bounds Read Vulnerability in Valkey Slot Migration by Valkey-IO
CVE-2026-85522

6.9MEDIUM

Key Information:

Vendor

Valkey-io

Status
Valkey
Vendor
CVE Published:
4 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-85522?

A security flaw has been identified in the Valkey component related to Slot Migration, specifically within the createSlotImportJob function of the src/cluster_migrateslots.c file. This vulnerability allows a malicious actor to manipulate the job_name argument, leading to out-of-bounds read conditions. Such an exploitation can be conducted remotely, posing significant risks to the integrity and confidentiality of system data. It is recommended that users upgrade to versions 9.0.5 or 9.1.1, which include the necessary patch (f4dc3ca09eb650c2fe14060090a41c524eca803f) to mitigate this vulnerability.

Affected Version(s)

valkey 9.0

valkey 9.1.0

valkey 9.5.0

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-2026-85522 - Proof of Concept

References

https://vuldb.com/vuln/398707
vdb-entrytechnical-description
https://vuldb.com/vuln/398707/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-85522
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
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)
.