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VulnerabilityPublished

CVE-2026-83350: Oracle Database Server · Uncontrolled Resource Consumption

Affects Oracle Database ServerSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 30 Oct 2026, 20:25 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 39% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Oracle CorporationOracle Database ServerAffected
  • >=21.3 <=21.23
  • >=23.4.0 <=23.26.3
Fixed in–
Mavencom.oracle.database/oracle-database-serverpkg:maven/com.oracle.database/oracle-database-serverOther threatsAffected
  • >=21.3 <=21.23
  • >=23.4.0 <=23.26.3
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Oracle has released security patches addressing this vulnerability as part of their September 2026 Critical Security Patch Update. Customers are strongly advised to apply the available patches promptly to remediate this issue. Oracle recommends remaining on actively supported versions and not delaying patch application. No alternative mitigations or workarounds are specified in the advisory.

Description

Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

References

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