CVE-2026-25589: redisbloom Heap-based Buffer Overflow

Vulnerability summary

CVE-2026-25589 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in redisbloom. EPSS estimates a 0.81% chance of exploitation in the next 30 days, higher than 56.1% of scored vulnerabilities.

Timeline

1. 05-05-2026
   PublishedVulnerability first disclosed.
2. 05-05-2026
   Last modifiedVulnerability information updated.

Description

RedisBloom is a probabilistic data structures module for Redis. In all versions of RedisBloom before 2.8.20, the module does not properly validate serialized values processed through the Redis RESTORE command. An authenticated attacker with permission to execute RESTORE on a server with the RedisBloom module loaded can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code execution. A workaround is to restrict access to the RESTORE command with ACL rules. This issue is fixed in version 2.8.20.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().