CVE-2026-73900Network attack vector

Unauthorized data disclosure via undisclosed HTTP flaw

Published Aug 18, 2026 · Updated Aug 19, 2026

Information disclosure in Oracle Helidon 4.5.1 allows remote attackers to read a subset of application-accessible data via HTTP. Oracle identifies the Imperative Web Server as the affected component but has not published the request-processing locus or the operation that mishandles untrusted input. No authentication or user interaction is required; network reachability to the application's HTTP service is sufficient, and the reported consequence is limited to unauthorized reads.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Oracle Helidon 4.5.1 allows remote attackers to read a subset of application-accessible data via HTTP. Oracle identifies the Imperative Web Server as the affected component but has not published the request-processing locus or the operation that mishandles untrusted input. No authentication or user interaction is required; network reachability to the application's HTTP service is sufficient, and the reported consequence is limited to unauthorized reads.

The record

CVE
CVE-2026-73900
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Oracle Corporation
Product
Helidon
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Helidonversion=4.5.1

Published CVSS scores

5.3Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo