Executive Summary

CVE-2026-25589 is a high-severity vulnerability in the RedisBloom module, which is used with Redis. The issue arises because RedisBloom does not properly validate serialized values processed through the Redis RESTORE command in versions before 2.8.20.

An authenticated attacker who has permission to execute the RESTORE command can supply a specially crafted serialized payload that triggers invalid memory access. This can lead to remote code execution on the affected system.

The root cause is insufficient validation of input data, which can cause unsafe memory operations such as heap-based buffer overflows.

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Impact Analysis

Exploitation of this vulnerability can have severe impacts including full system compromise, data exfiltration, and service disruption.

• Remote code execution allowing attackers to run arbitrary code on the server.
• Potential loss of confidentiality due to unauthorized data access.
• Integrity and availability of the system can be compromised, leading to service outages or corrupted data.

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Detection Guidance

Detection of this vulnerability involves verifying if the RedisBloom module is loaded on your Redis server and if the RESTORE command is accessible to authenticated users.

You can check if RedisBloom is loaded by running the Redis command:

• MODULE LIST

To check if the RESTORE command is accessible, you can test permissions or review ACL rules with:

• ACL LIST

Additionally, monitoring logs for unusual or unauthorized RESTORE command usage may help detect exploitation attempts.

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Mitigation Strategies

Immediate mitigation steps include restricting access to the RESTORE command using Redis ACL rules to prevent unauthorized or untrusted users from executing it.

Applying the security patch by upgrading RedisBloom to version 2.8.20 or later will fix the vulnerability.

If upgrading immediately is not possible, ensure that only trusted authenticated users have permission to use the RESTORE command.

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Compliance Impact

The vulnerability in RedisBloom allows an authenticated attacker to execute remote code, potentially leading to full system compromise, data exfiltration, or service disruption.

Such impacts on confidentiality, integrity, and availability of data could affect compliance with common standards and regulations like GDPR and HIPAA, which require protection of sensitive data and system integrity.

Mitigation involves patching the module or restricting access to the RESTORE command, which is necessary to maintain compliance by preventing unauthorized access or data breaches.

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