valkey-io valkey-bloom assertion

Summaryinfo

A vulnerability was found in valkey-io valkey-bloom. It has been rated as problematic. This affects an unknown part. The manipulation leads to assertion. This vulnerability is traded as CVE-2026-21864. It is possible to initiate the attack remotely. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in valkey-io valkey-bloom (version unknown) and classified as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability. The summary by CVE is:

Valkey-Bloom is a Rust based Valkey module which brings a Bloom Filter (Module) data type into the Valkey distributed key-value database. Prior to commit a68614b6e3845777d383b3a513cedcc08b3b7ccd, a specially crafted `RESTORE` command can cause Valkey to hit an assertion, causes the server to shutdown. Valkey modules are required to handle errors in RDB parsing by using `VALKEYMODULE_OPTIONS_HANDLE_IO_ERRORS` flag. If this flag is not set, errors encountered during parsing result in a system assertion which shuts down the system. Even though the Valkey-bloom module correctly handled the parsing, it did not originally set the flag. Commit a68614b6e3845777d383b3a513cedcc08b3b7ccd contains a patch. One may mitigate this defect by disabling the `RESTORE` command if it is unused by one's application.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-21864 since 01/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available.

Applying the patch a68614b6e3845777d383b3a513cedcc08b3b7ccd is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

• valkey-io

Name

• valkey-bloom

License

• open-source

Website

• Product: https://github.com/valkey-io/valkey-bloom/

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