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CVE-2026-84108 – Cross-Site Scripting (Remote Code Execution in Browser Context) – IBM Guardium Data

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Summary

CVE-2026-84108 is a cross-site scripting (XSS) vulnerability affecting IBM Guardium Data Protection 12.2, caused by improper neutralization of input during web page generation (CWE-79). A remote, unauthenticated attacker can exploit the flaw to inject and execute arbitrary script/HTML in the context of a victim’s browser session against the Guardium web management interface. The issue carries a CVSS v3.1 base score of 8.1 (High).

Technical details

  • Root cause: The Guardium Data Protection web interface fails to properly sanitize/encode certain input before it is rendered back into web pages, allowing injected script content to be reflected or stored and later executed.
  • Trigger conditions: An attacker delivers crafted input (e.g., via a malicious link, form submission, or manipulated request parameter) that is processed and rendered by the affected web UI component without proper output encoding.
  • Attack vector: Network — the vulnerability is remotely exploitable over HTTP(S) and does not require any privileges (PR:N) or user interaction beyond the victim loading/interacting with the crafted content (UI:N per the vector string), though attack complexity is rated High (AC:H).
  • Impact: Successful exploitation can lead to execution of attacker-controlled script in the browser session of a user interacting with the Guardium web console, with high impact to confidentiality, integrity, and availability (C:H/I:H/A:H) — potentially enabling session hijacking, credential theft, or manipulation of the compromised session’s actions within the data protection console.

Affected software

  • IBM Guardium Data Protection 12.2 (12.2.0)

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: IBM has published a fix for this issue as part of a broader Guardium Data Protection 12.2 security bulletin (covering CVE-2026-84108 along with numerous other vulnerabilities). Apply the SqlGuard_12.0p233_FixPack for Guardium Data Protection 12.2, available via IBM Support Fix Central, as soon as possible.
  • If immediate patching is not possible: No official workaround has been published by IBM for this specific vulnerability. Restrict network access to the Guardium web management interface to trusted administrative networks/VPNs, enforce strict browser security controls (e.g., disabling unnecessary script execution paths, using modern browsers with XSS protections), and monitor web console access logs for anomalous requests until the fix pack can be applied.
  • Review the full IBM security bulletin for this release, as it addresses multiple additional vulnerabilities in the same Guardium Data Protection 12.2 codebase that should be remediated together.

References

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