CVE-2022-44262: ff4j 1.8.1 is vulnerable to Remote Code Execution (RCE).

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-44262 is a critical-severity flaw (CVSS 9.8) affecting ff4j. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ff4j 1.8.1 is vulnerable to Remote Code Execution (RCE).

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-94
Published	2022-12-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ff4j

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-01 05:15 UTCPublished CVE record published
2026-06-17 05:08 UTCUpdated Record last modified

ff4j ff4j DOWNGRADE

Affected: 1.8.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8.1

1. Check installed version

apt-cache policy ff4j || rpm -q ff4j || ff4j --version

2. No fixed release: DOWNGRADE to a release before 1.8.1 (Debian / Ubuntu)

apt-cache madison ff4j sudo apt install ff4j=<VERSION_BEFORE_1.8.1> sudo apt-mark hold ff4j

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ff4j sudo dnf downgrade ff4j-<VERSION_BEFORE_1.8.1> sudo dnf versionlock add ff4j

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-44262?

ff4j: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-44262 being exploited?

CVE-2022-44262 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-44262 affect?

CVE-2022-44262 affects ff4j. Severity is critical (CVSS 9.8). ff4j 1.8.1 is vulnerable to Remote Code Execution (RCE).

How urgent is CVE-2022-44262?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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