CVE-2026-70716Network attack vector

Unauthenticated critical-data tampering via undisclosed HTTP flaw

Published Aug 18, 2026 · Updated Aug 25, 2026

Improper access control in Oracle Helidon 4.5.0 allows remote attackers to modify critical data through the Imperative Web Server. Oracle has not published the flawed method, request field, or access-control check that mishandles untrusted HTTP input. Exploitation requires no authentication but does require network access over HTTP and high attack complexity; successful attacks can create, delete, or modify Helidon-accessible data.

CVSS severity5.9
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Oracle Helidon 4.5.0 allows remote attackers to modify critical data through the Imperative Web Server. Oracle has not published the flawed method, request field, or access-control check that mishandles untrusted HTTP input. Exploitation requires no authentication but does require network access over HTTP and high attack complexity; successful attacks can create, delete, or modify Helidon-accessible data.

The record

CVE
CVE-2026-70716
Published
Aug 18, 2026
Updated
Aug 25, 2026
Vendor
Oracle Corporation
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 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?

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

  1. Affected versionversion=4.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Helidonversion=4.5.0

Published CVSS scores

5.9Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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.

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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

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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