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CVE-2025-36366VulnerabilityPublished Updated

CVE-2025-36366: IBM Db2 for Linux, UNIX and Windows · CWE-943

Affects IBM Db2 for Linux, UNIX and WindowsSource CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
IBMDb2 for Linux, UNIX and WindowsAffected
  • >=11.5.0 <=11.5.9
  • >=12.1.0 <=12.1.3
Fixed in–

CPE configurations (20)

  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:linux:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:unix:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:aix:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:windows:*:*
  • cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:zos:*:*
  • cpe:2.3:a:ibm:db2:11.5.9:*:*:*:*:linux:*:*

AI-suggested

1. Restrict database user privileges to the minimum necessary, especially limiting access to execute JSON_Object scalar function queries to trusted users only. 2. Monitor and audit database query logs to detect unusual or repeated invocations of the JSON_Object function that could indicate exploitation attempts. 3. Implement network-level access controls to restrict which hosts can connect to the Db2 server, reducing exposure to potential attackers. 4. Prepare incident response plans for rapid recovery from Db2 server crashes, including automated restart procedures and backup restoration. 5. Engage with IBM support channels to obtain patches or workarounds as soon as they become available and apply them promptly. 6. Consider deploying Web Application Firewalls (WAFs) or database activity monitoring tools that can detect and block malicious queries targeting this vulnerability. 7. Test database workloads in staging environments to identify any legitimate use of JSON_Object that may be impacted by mitigation measures, ensuring business continuity.

Description

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a user to cause a denial of service by executing a query that invokes the JSON_Object scalar function, which may trigger an unhandled exception leading to abnormal server termination.

References

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