CVE-2026-46835Network attack vector

Unauthenticated Net Service hang or repeatable crash

Published May 28, 2026 · Updated May 28, 2026

Uncontrolled resource consumption in Oracle Database Server 23.4.0 through 23.26.2 allows remote attackers to hang or crash Net Service via TLS. Oracle has not disclosed the malformed input, code locus, or resource-management operation that causes Net Service to stop responding or crash repeatedly. No credentials or user interaction are required, and affected 23.x Database, Grid, and Client Oracle homes expose only an availability impact.

CVSS severity7.5
High
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

Uncontrolled resource consumption in Oracle Database Server 23.4.0 through 23.26.2 allows remote attackers to hang or crash Net Service via TLS. Oracle has not disclosed the malformed input, code locus, or resource-management operation that causes Net Service to stop responding or crash repeatedly. No credentials or user interaction are required, and affected 23.x Database, Grid, and Client Oracle homes expose only an availability impact.

The record

CVE
CVE-2026-46835
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Oracle
Product
Oracle Database
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 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=23.4.0 <=23.26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle · Oracle Databaseversion=23.4.0 <=23.26.2

Published CVSS scores

7.5OracleCVSS: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 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-400Uncontrolled Resource Consumption
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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