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CVE-2026-87958 IBM CVE debrief

IBM Db2 vulnerability CVE-2026-87958 allows a privileged user to disable a specific functionality on a Db2 server under certain conditions, leading to a denial of service. The affected versions are 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. This issue requires verification of exposure and prioritization of remediation by Db2 administrators and security teams. The vulnerability has a high severity score and potential operational impacts include denial of service attacks and verification of affected versions and configurations.

Vendor
IBM
Product
Db2
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-10
Original CVE updated
2026-09-11
Advisory published
2026-09-10
Advisory updated
2026-09-11

Who should care

Db2 administrators and security teams responsible for IBM Db2 deployments should assess exposure and prioritize remediation due to the high severity of the vulnerability. They should verify affected versions and configurations, assess potential operational impacts, and plan for remediation. Security teams should also monitor for potential denial of service attacks and review compensating controls for exposed systems.

Why it matters

CVE-2026-87958 is a high-severity denial of service vulnerability in IBM Db2 that requires verification of exposure and prioritization of remediation by Db2 administrators and security teams.

  • Potential denial of service attacks
  • Verification of affected versions and configurations
  • Remediation prioritization for Db2 administrators

Technical summary

CVE-2026-87958 is a denial of service vulnerability in IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. A privileged user can disable a specific functionality on a Db2 server under certain conditions. This issue has a high severity score and requires verification of exposure and prioritization of remediation by Db2 administrators and security teams. The vulnerability affects Db2 deployments and requires assessment of exposure.

Defensive priority

Db2 administrators should verify exposure and prioritize remediation

Recommended defensive actions

  • Verify affected Db2 versions and configurations
  • Assess exposure and prioritize remediation
  • Monitor for potential denial of service attacks

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. IBM support page referenced for additional details. Further verification is needed to assess exposure and prioritize remediation. The CVE Program record and NVD detail page offer source-provided metadata and vulnerability assessments. Additional details can be found on the IBM support page.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-87958 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-87958

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-87958 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-87958

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.