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PatchSiren cyber security CVE debrief

CVE-2026-14909 IBM CVE debrief

IBM WebSphere Application Server Liberty Information Disclosure vulnerability allows authenticated attackers to obtain sensitive information when restConnector-2.0 is enabled. Affected versions range from 17.0.0.3 to 26.0.0.9. The vulnerability impacts Liberty servers with restConnector-2.0 enabled, allowing attackers to access sensitive information. Defenders managing these servers should assess exposure and apply patches or updates promptly to mitigate potential information disclosure.

Vendor
IBM
Product
WebSphere Application Server - Liberty
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-14
Advisory published
2026-10-13
Advisory updated
2026-10-14

Who should care

Defenders managing IBM WebSphere Application Server - Liberty instances, especially those with restConnector-2.0 enabled, should assess exposure and apply patches or updates.

Why it matters

CVE-2026-14909 is a medium-severity information disclosure vulnerability in IBM WebSphere Application Server - Liberty. Defenders should prioritize verifying exposure, applying patches, and monitoring for potential information disclosure attempts.

  • Potential information disclosure for authenticated attackers
  • Need to verify exposure and apply patches or updates
  • Possible monitoring for information disclosure attempts

Technical summary

The vulnerability allows an authenticated attacker to obtain sensitive information when restConnector-2.0 is enabled on IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.9. This information disclosure vulnerability impacts Liberty servers with restConnector-2.0 enabled, allowing attackers to access sensitive information. Defenders should prioritize verifying exposure and applying patches, focusing on Liberty servers with restConnector-2.0 enabled, and monitor for potential information disclosure attempts.

Defensive priority

Defenders should prioritize verifying exposure and applying patches, focusing on Liberty servers with restConnector-2.0 enabled.

Recommended defensive actions

  • Verify if restConnector-2.0 is enabled on Liberty servers and assess exposure
  • Apply patches or updates provided by IBM
  • Monitor for potential information disclosure attempts

Evidence notes

The CVE record and source item provide details on the affected versions and configuration. IBM has released a vendor advisory with patch information. The affected versions range from 17.0.0.3 to 26.0.0.9, and defenders should verify if restConnector-2.0 is enabled on Liberty servers to assess exposure. The vendor advisory provides patch information for affected systems. Evidence is limited to public CVE Program records and a vendor advisory; further verification may be needed to ensure

Sources and references

Verified primary and authoritative sources

  • CVE-2026-14909 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-14909

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

  • CVE-2026-14909 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-14909

    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.