What is CVE-2024-1456?

CVE-2024-1456 is a high-severity vulnerability in H2o, classified under CWE-840. CVSS score: 7.1/10. Published 2024-04-16.

How severe is CVE-2024-1456?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in H2o

CVE-2024-1456

An S3 bucket takeover vulnerability was identified in the h2oai/h2o-3 repository. The issue involves the S3 bucket 'http://s3.amazonaws.com/h2o-training', which was found to be vulnerable to unauthorized takeover.

Published 2024-04-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

H2o — versions 3.45.0.6386
H2oai H2oai/h2o-3 — versions unspecified

Weakness classification (CWE)

CWE-840

References

huntr.com/bounties/7c1b7f27-52f3-4b4b-9d81-e277f5e0ab6b (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2024-1456?: CVE-2024-1456 is a high-severity vulnerability in H2o, classified under CWE-840. CVSS score: 7.1/10. Published 2024-04-16.
How severe is CVE-2024-1456?: High severity. CVSS v3 base score is 7.1 out of 10.