CVE-2026-83439: Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-security-providers-idcs-m

Routine

HIGH 8.1UPGRADE

CVE-2026-83439 is a high-severity flaw (CVSS 8.1) affecting helidon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-security-providers-idcs-mapper). Supported versions that are affected are 3.0.0-3.2.20 and 4.0.0-4.5.4. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Helidon

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-09-15
Last modified	2026-09-28

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-09-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-15 20:18 UTCPublished CVE record published
2026-09-28 15:20 UTCUpdated Record last modified

oracle helidon UPGRADE

Affected: >= 3.0.0 and <= 3.2.20 · >= 4.0.0 and <= 4.5.4

Fixed in: newer than 4.5.4

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to newer than 4.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade helidon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade helidon

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 helidon sudo apt install helidon=<VERSION_BEFORE_3.0.0> sudo apt-mark hold helidon

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

dnf --showduplicates list helidon sudo dnf downgrade helidon-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add helidon

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-2026-83439?

helidon: upgrade to newer than 4.5.4. Exact commands for each OS are on this page.

Is CVE-2026-83439 being exploited?

CVE-2026-83439 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-2026-83439 affect?

CVE-2026-83439 affects helidon. Severity is high (CVSS 8.1). Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-security-providers-idcs-mapper). Supported versions that are affected are 3.0.0-3.2.20 and 4.0.0-4.5.4. Easily exploitable vulnerability allows low privil

How urgent is CVE-2026-83439?

Priority 36/100. High severity

Related CVEs

CVE-2026-60853 LOW 3.7 DOWNGRADE Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)
CVE-2026-60915 HIGH 7.4 DOWNGRADE Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)
CVE-2026-71074 CRITICAL 9.8 DOWNGRADE Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)
CVE-2026-71152 CRITICAL 9.8 DOWNGRADE Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)
CVE-2026-71164 CRITICAL 9.8 DOWNGRADE Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)

References

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