CVE-2026-73883Network attack vector

Unauthorized data disclosure via undisclosed flaw

Published Aug 18, 2026 · Updated Aug 25, 2026

Information disclosure in the Imperative Web Server in Oracle Helidon 3.2.18 allows remote attackers to read all Helidon-accessible data via HTTP. Oracle's August 18, 2026 CVE record and August 2026 Critical Security Patch Update identify the affected component but do not disclose the vulnerable class, request handler, or operation that exposes untrusted HTTP requests to protected data. Exposure requires only network reachability to the server's HTTP interface and no authentication or user interaction; public sources bound the consequence to confidentiality impact, with no published evidence of data modification or service interruption.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Imperative Web Server in Oracle Helidon 3.2.18 allows remote attackers to read all Helidon-accessible data via HTTP. Oracle's August 18, 2026 CVE record and August 2026 Critical Security Patch Update identify the affected component but do not disclose the vulnerable class, request handler, or operation that exposes untrusted HTTP requests to protected data. Exposure requires only network reachability to the server's HTTP interface and no authentication or user interaction; public sources bound the consequence to confidentiality impact, with no published evidence of data modification or service interruption.

The record

CVE
CVE-2026-73883
Published
Aug 18, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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

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Your stack

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