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PatchSiren cyber security CVE debrief

CVE-2026-9056 Talend CVE debrief

A stored cross-site scripting (XSS) vulnerability exists in the Talend Administration Center. An attacker with server management permissions can store a malicious payload that executes when triggered by a different user. The vulnerability requires low attack complexity and user interaction, with network-based attack vector. The CVSS 3.1 score of 5.4 reflects medium severity due to the need for authenticated access and user interaction to trigger the payload.

Vendor
Talend
Product
Talend Administration Center
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-20
Original CVE updated
2026-07-23
Advisory published
2026-05-20
Advisory updated
2026-07-23

Who should care

Organizations running Talend Administration Center, particularly those with multiple users holding server management privileges. Security teams responsible for web application security and privilege management in data integration platforms.

Technical summary

Stored XSS (CWE-79) in Talend Administration Center. Attack vector: network. Attack complexity: low. Privileges required: low (server management). User interaction: required. Scope: changed. Confidentiality impact: low. Integrity impact: low. Availability impact: none. Exploitation requires authenticated access with server management permissions to store payload, with separate user action required to trigger execution.

Defensive priority

medium

Recommended defensive actions

  • Review and apply the security fix referenced in the Qlik community security article for Talend Administration Center
  • Audit server management permissions to ensure principle of least privilege
  • Implement Content Security Policy (CSP) headers to mitigate XSS impact
  • Review server configuration inputs for proper output encoding and sanitization
  • Monitor for anomalous server management activities in Talend Administration Center logs

Evidence notes

The CVE description confirms stored XSS in Talend Administration Center with privilege-bound exploitation (server management permissions required). CVSS vector indicates network attack vector, low complexity, low privileges required, user interaction needed, and scope change to impacted component. Vendor attribution to Qlik is supported by reference link to Qlik community security article. NVD status is 'Deferred' indicating ongoing analysis.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9056 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9056

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

  • CVE-2026-9056 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9056

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

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://community.qlik.com/t5/Official-Support-Articles/Security-fix-for-Qlik-Talend-Administration-Center-cross-site/ta-p/2548522

    4ac701fe-44e9-4bcd-9585-dd6449257611

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.