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Back to active CVEs
Medium · CVSS 6.5CVE-2026-11906

IBM® Db2® federated server is vulnerable to a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns by autheticated userCVE-2026-11906

Answer in brief

CVE-2026-11906 records a Medium severity (CVSS 6.5) vulnerability in IBM® Db2® federated server is vulnerable to a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns by autheticated user. The current sources do not mark it as known exploited. The current feed maps IBM/Db2 (generic), IBM/Db2 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 30, 2026Updated Oct 25, 2026Source checked Nov 3, 2026First seen by HOL Jun 30, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
6 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/Db2 (generic), IBM/Db2 (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:ibm:db2:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:opengroup:unix:-:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/Db2generic11.5.0 || 12.1.0Not reported
IBM/Db2generic>=11.5.0 <=11.5.9 || >=12.1.0 <=12.1.4Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/Db2, IBM/Db2.
  2. 2Review the reported fix. Source-reported solution: Customers running any vulnerable affected level of an affected Program, V11.5, and V12.1, can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent level for each impacted release:V11.5.9, and V12.1.4. They can be applied to any affected level of the appropriate release to remediate this vulnerability. ReleaseFixed in mod packAPARDownload URLV11.5TBD https://www.ibm.com/support/pages/node/7087189 V12.1 TBD https://www.ibm.com/support/pages/node/7267513 IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Evidence timeline and material changes

  1. Published upstream

    Jun 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 30, 2026

Sources and claim methodology

  • Source referenceibm.com
Upstream source description

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-1284
Source
CVE List V5
Source checked
Nov 3, 2026
References
1 linked source
Open source record