Low severity · published Aug 31, 2026
CVE-2026-82677
valkey-io valkey Module Timer module.c moduleTimerHandler double free
2.4
CVSS
0.5%
EPSS
No
On KEV
Description
A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
valkey · valkey-io
9.1.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82677
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82677
github.com
https://github.com/user-attachments/files/30118801/PoC.zip
github.com
https://github.com/valkey-io/valkey/
github.com
https://github.com/valkey-io/valkey/commit/b349fe2821e3998534b1454c1b64a478daf8c6b7
github.com
https://github.com/valkey-io/valkey/issues/4200
github.com
https://github.com/valkey-io/valkey/pull/4211
vuldb.com
https://vuldb.com/cve/CVE-2026-82677
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