CVE-2026-85656 OS command injection in Amazon log4j-cve-2021-44228-hotpatch
A local attacker can execute arbitrary commands with root privileges by exploiting OS command injection in the Amazon Linux log4j hotpatch package.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85656?
CVE-2026-85656 is a high-severity command injection vulnerability in Amazon log4j-cve-2021-44228-hotpatch, published on 4 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2026-85656?
How do I fix CVE-2026-85656?
No fix has been published for CVE-2026-85656 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-85656 being exploited?
There is no known exploitation of CVE-2026-85656 in the wild and no public exploit code.
Sources
Also known as GHSA-4p2r-rwww-hrf2.