Free and open · new CVEs checked every 20 minutesStatusRSSOpen dataContact

CVE-2026-73905: Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server)

53
This month
CRITICAL 9.8REMOTEDOWNGRADE

CVE-2026-73905 is a critical-severity flaw (CVSS 9.8) 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: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3

Why this priority

  • Critical severity
  • CISA SSVC: automatable with total technical impact
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.5% (top 58%)
CISA exploited listNo
WeaknessCWE-284
Published2026-08-18
Last modified2026-10-22
Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oracle helidon DOWNGRADE
Affected: 4.5.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.0
1. Check installed version
apt-cache policy helidon || rpm -q helidon || helidon --version
2. No fixed release: DOWNGRADE to a release before 4.5.0 (Debian / Ubuntu)
apt-cache madison helidon sudo apt install helidon=<VERSION_BEFORE_4.5.0> sudo apt-mark hold helidon
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list helidon sudo dnf downgrade helidon-<VERSION_BEFORE_4.5.0> 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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · python-streamlink · FIXED · 8.6.2-1.fc46 · FEDORA-2026-a56fcfdc08 · source
sudo dnf upgrade --advisory=FEDORA-2026-a56fcfdc08
Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source
sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15
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-2026-73905?

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

Is CVE-2026-73905 being exploited?

CVE-2026-73905 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-2026-73905 affect?

CVE-2026-73905 affects helidon. Severity is critical (CVSS 9.8). Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. Easily exploitable vulnerability allows unauthenticated attacker with network access

How urgent is CVE-2026-73905?

Priority 53/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

References

← Back to latest CVEs