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CVE-2026-63639— Valkey: UAF in stream deserialization may lead to remote code execution

Quick assessment

Affected
valkey-io valkey
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Valkey是Valkey组织开源的一个灵活的分布式键值数据库。 Valkey 7.2.14之前版本、8.0.10之前版本、8.1.9之前版本、9.0.5之前版本和9.1.1之前版本存在资源管理错误漏洞，该漏洞源于RESTORE命令接受格式错误的RDB流负载，在流消费者组反序列化时将同一个Pending Entry List NACK分配给多个消费者，导致释放后重用，可能允许远程代码执行。

CVSS 8.8 · High EPSS 0.89% · P59

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
valkey-io valkey < 7.2.14 affected
>= 8.0.0, < 8.0.10 affected
>= 8.1.0, < 8.1.9 affected
>= 9.0.0, < 9.0.5 affected
>= 9.1.0, < 9.1.1 affected
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I. Basic Information for CVE-2026-63639

Vulnerability Information
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Vulnerability Title
Valkey: UAF in stream deserialization may lead to remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK to multiple consumers during stream consumer-group deserialization, causing a use-after-free when one consumer is deleted while another still references the shared NACK and potentially allowing remote code execution. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Valkey 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Valkey是Valkey组织开源的一个灵活的分布式键值数据库。 Valkey 7.2.14之前版本、8.0.10之前版本、8.1.9之前版本、9.0.5之前版本和9.1.1之前版本存在资源管理错误漏洞，该漏洞源于RESTORE命令接受格式错误的RDB流负载，在流消费者组反序列化时将同一个Pending Entry List NACK分配给多个消费者，导致释放后重用，可能允许远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
valkey-io valkey < 7.2.14 -

II. Public POCs for CVE-2026-63639

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
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Qwen3.6-35B-A3B · 9401 chars
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POC zip download
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III. Intelligence Information for CVE-2026-63639

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Patches & Fixes for CVE-2026-63639 (7)

Vendor Advisories for CVE-2026-63639 (1)

Vendor Pages for CVE-2026-63639 (4)

IV. Related Vulnerabilities

Same product: valkey
Same vendor: valkey-io
Same weakness: CWE-416