Buffer overflow in Redisbloom
CVE-2026-25589
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.008 · change: -0.007
Affected products
- Redisbloom — versions < 2.8.20
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/RedisBloom/RedisBloom/releases/tag/v2.8.20 (Product, Patch)
- github.com/RedisBloom/RedisBloom/security/advisories/GHSA-7862-34pw-44wv (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-25589?
- CVE-2026-25589 is a high-severity vulnerability in Redisbloom, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-05-05.
- How severe is CVE-2026-25589?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-25589 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.