8.5

CVE-2026-85656: amazon log4j-cve-2021-44228-hotpatch OS Command Injection

CVSS: 8.5v4.0HighAwaiting analysis
Published 04-09-2026Last modified 04-09-2026
Open JSON

Vulnerability summary

CVE-2026-85656 is a high (CVSS 8.5) OS Command Injection vulnerability in amazon log4j-cve-2021-44228-hotpatch. EPSS estimates a 1.08% chance of exploitation in the next 30 days, higher than 64.5% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
1.08%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 04-09-2026
    PublishedVulnerability first disclosed.
  2. 04-09-2026
    Last modifiedVulnerability information updated.

Description

An OS command injection issue in the log4j-cve-2021-44228-hotpatch package in Amazon Linux before 1.3-9 might allow a local user to execute arbitrary commands with root privileges via a Java process whose executable path contains embedded newline characters.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

1.08%

Chance of exploitation in the next 30 days

Percentile

65%

Versus all other CVEs

30-day change

-0.04 pp

From 1.12% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Amazon1 product

1 vendor · 1 product

References

2 links