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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00888.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
valkey-io valkey affected
Version Status Constraints
< 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 —

No data.

No data.

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Vendors Products
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Valkey Subscribe

Project Subscriptions

Vendors Products
Valkey-io Subscribe
Valkey Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/valkey-io/valkey/commit/06bc7768fe609f2054e69ccedefe7628f5675da9 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/commit/509cb3c74e8cbc9c0498ebe8b6c93dcd605e7271 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798291 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378445 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62778 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/pull/4073 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/releases/tag/7.2.14 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/releases/tag/8.0.10 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/releases/tag/8.1.9 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/releases/tag/9.0.5 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/releases/tag/9.1.1 cve-icon cve-icon cve-icon
https://github.com/valkey-io/valkey/security/advisories/GHSA-mvcj-73cw-22m4 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-63639 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-63639 cve-icon
History

Tue, 25 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-825
References
Metrics threat_severity

None

 threat_severity

Important

Fri, 21 Aug 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 18 Aug 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Valkey-io
Valkey-io valkey
Vendors & Products Valkey-io
Valkey-io valkey

Tue, 18 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
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.
Title Valkey: UAF in stream deserialization may lead to remote code execution
Weaknesses CWE-416
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-20T18:36:40.745Z

Reserved: 2026-07-17T14:11:15.482Z

Link: CVE-2026-63639

cve-icon Vulnrichment

Updated: 2026-08-20T18:36:37.868Z

cve-icon NVD

Status : Received

Published: 2026-08-18T15:16:56.627

Modified: 2026-08-20T19:16:57.430

Link: CVE-2026-63639

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-18T14:23:52Z

Links: CVE-2026-63639 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-25T15:30:05Z

Weaknesses