CVE-2026-73904Network attack vector

Unauthorized data modification and disclosure

Published Aug 18, 2026 · Updated Aug 19, 2026

Improper access control in Oracle Helidon 4.5.1 allows remote attackers to read and modify application data via HTTP requests. Oracle and the public CVE records identify the Imperative Web Server component but do not disclose the specific handler, filter, or authorization check that accepts the untrusted request and permits unauthorized reads and writes. Exposure requires network reachability to an affected HTTP service and no authentication or user interaction; published scoring bounds the impact to subset data disclosure and modification rather than service interruption.

CVSS severity6.5
Medium
EPSS probability0.20%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Oracle Helidon 4.5.1 allows remote attackers to read and modify application data via HTTP requests. Oracle and the public CVE records identify the Imperative Web Server component but do not disclose the specific handler, filter, or authorization check that accepts the untrusted request and permits unauthorized reads and writes. Exposure requires network reachability to an affected HTTP service and no authentication or user interaction; published scoring bounds the impact to subset data disclosure and modification rather than service interruption.

The record

CVE
CVE-2026-73904
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Oracle
Product
Helidon
Classifications
CWE-284, 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

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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 · Helidonversion=4.5.1

Published CVSS scores

6.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
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

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Your stack

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