CVE-2026-70908Network attack vectorHinoki check available

Unauthenticated hangs and crashes via undisclosed HTTP requests

Published Aug 18, 2026 · Updated Aug 28, 2026

Denial of service in Oracle Helidon's Imperative Web Server 3.0.0 through 3.2.17 allows remote attackers to crash or hang services via HTTP. Oracle has not disclosed the malformed request or request-processing operation that triggers the failure in the Imperative Web Server. No authentication or user interaction is required, and repeated requests can keep an affected service unavailable through recurring crashes or a persistent hang.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Oracle Helidon's Imperative Web Server 3.0.0 through 3.2.17 allows remote attackers to crash or hang services via HTTP. Oracle has not disclosed the malformed request or request-processing operation that triggers the failure in the Imperative Web Server. No authentication or user interaction is required, and repeated requests can keep an affected service unavailable through recurring crashes or a persistent hang.

The record

CVE
CVE-2026-70908
Published
Aug 18, 2026
Updated
Aug 28, 2026
Vendor
Oracle Corporation
Product
Helidon
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=3.0.0 <=3.2.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Helidonversion=3.0.0 <=3.2.17

Published CVSS scores

7.5Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

T1499.004Application or System Exploitation

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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