CVE-2026-9158: In Eclipse 4diac FORTE versions 3.0.0 to 3.1.0, a specially crafted DELETE connection command to the managemen

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-9158 is a critical-severity flaw (CVSS 9.8) affecting 4diac forte. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Eclipse 4diac FORTE versions 3.0.0 to 3.1.0, a specially crafted DELETE connection command to the management interface can lead to a dangling pointer. This allows subsequent commands to access freed memory (use-after-free).

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-06-18
Last modified	2026-10-26

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-18 14:17 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

eclipse 4diac forte UPGRADE

Affected: >= 3.0.0 and <= 3.1.0

Fixed in: newer than 3.1.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy 4diac-forte || rpm -q 4diac-forte || 4diac-forte --version

2. UPGRADE to newer than 3.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 4diac-forte

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 4diac-forte

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison 4diac-forte sudo apt install 4diac-forte=<VERSION_BEFORE_3.0.0> sudo apt-mark hold 4diac-forte

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 4diac-forte sudo dnf downgrade 4diac-forte-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add 4diac-forte

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-2026-9158?

4diac forte: upgrade to newer than 3.1.0. Exact commands for each OS are on this page.

Is CVE-2026-9158 being exploited?

CVE-2026-9158 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-2026-9158 affect?

CVE-2026-9158 affects 4diac forte. Severity is critical (CVSS 9.8). In Eclipse 4diac FORTE versions 3.0.0 to 3.1.0, a specially crafted DELETE connection command to the management interface can lead to a dangling pointer. This allows subsequent commands to access freed memory (use-after-free).

How urgent is CVE-2026-9158?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

References

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