CVE-2026-63639
Valkey: UAF in stream deserialization may lead to remote code execution
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.
INFO
Published Date :
Aug. 18, 2026, 3:16 p.m.
Last Modified :
Aug. 18, 2026, 3:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-63639
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Valkey to version 7.2.14 or later.
- Update Valkey to version 8.0.10 or later.
- Update Valkey to version 8.1.9 or later.
- Update Valkey to version 9.0.5 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63639.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63639 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63639
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63639 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63639 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'valkey-io', 'product': 'valkey', 'versions': [{'status': 'affected', 'version': '< 7.2.14'}, {'status': 'affected', 'version': '>= 8.0.0, < 8.0.10'}, {'status': 'affected', 'version': '>= 8.1.0, < 8.1.9'}, {'status': 'affected', 'version': '>= 9.0.0, < 9.0.5'}, {'status': 'affected', 'version': '>= 9.1.0, < 9.1.1'}]}] 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-416 Added Reference https://github.com/valkey-io/valkey/commit/06bc7768fe609f2054e69ccedefe7628f5675da9 Added Reference https://github.com/valkey-io/valkey/commit/509cb3c74e8cbc9c0498ebe8b6c93dcd605e7271 Added Reference https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798291 Added Reference https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378445 Added Reference https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62778 Added Reference https://github.com/valkey-io/valkey/pull/4073 Added Reference https://github.com/valkey-io/valkey/releases/tag/7.2.14 Added Reference https://github.com/valkey-io/valkey/releases/tag/8.0.10 Added Reference https://github.com/valkey-io/valkey/releases/tag/8.1.9 Added Reference https://github.com/valkey-io/valkey/releases/tag/9.0.5 Added Reference https://github.com/valkey-io/valkey/releases/tag/9.1.1 Added Reference https://github.com/valkey-io/valkey/security/advisories/GHSA-mvcj-73cw-22m4