Use After Free Affecting valkey-io/valkey package, versions [,7.2.13)[8.0.0-rc1,8.0.8)[8.1.0-rc1,8.1.7)[9.0.0-rc1,9.0.4)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-VALKEYIOVALKEY-16425743
- published6 May 2026
- disclosed5 May 2026
- creditYoni Shiraz
Introduced: 5 May 2026
CVE-2026-23631 (opens in a new tab)How to fix?
Upgrade valkey-io/valkey to version 7.2.13, 8.0.8, 8.1.7, 9.0.4 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the master-replica synchronization process when replica-read-only is disabled or can be disabled. An authenticated attacker can execute arbitrary code on the replica by exploiting a use-after-free condition during Lua script execution.
Workaround
This vulnerability can be mitigated by preventing users from executing Lua scripts or by ensuring that replicas always have replica-read-only enabled.