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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 是一个分布式键值数据库。在版本 7.2.14、8.0.10、8.1.9、9.0.5 和 9.1.1 之前，Valkey 的 RESTORE 命令接受格式错误的 RDB 流负载，该负载在反序列化流消费者组期间，会将一个待处理条目列表（Pending Entry List）的 NACK（否定确认）分配给多个消费者。当其中一个消费者被删除时，若另一个消费者仍引用共享的 NACK，则会导致悬垂指针释放（use-after-free）漏洞，从而可能允许远程代码执行。该问题已在版本 7.2.14、8.0.10、8

CVSS 8.8 · High EPSS 1.17% · P65

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

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
Qwen3.6-35B-A3B · 9401 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
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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

V. Comments for CVE-2026-63639

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