CVE-2026-19133: IBM Storage TS4500 Library authorization bypass in password modification

CVE-2026-19133 · Severity: high · CVSS 8.1 · Published 2026-11-08

IBM Storage TS4500 Library is a tape storage system used for enterprise data backup and archival. A vulnerability in its web interface and REST API allows an authenticated user with lower privileges to change another user's password, leading to account takeover and full access to the storage system. This could allow an attacker to gain administrative control, modify backups, or access sensitive archived data.

Technologies: IBM Storage TS4500 Library. Vendors: IBM.

Quick answers

Is CVE-2026-19133 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-19133 being exploited in the wild.
How severe is CVE-2026-19133?
High severity, with a CVSS score of 8.1, published 8 November 2026.
Which products and versions are affected?
IBM Storage TS4500 Library 1.1.1.6 through 1.12.0.3.
Is there a fix for CVE-2026-19133?
Yes: fixed in Storage TS4500 Library 1.12.0.4 Fix Pack or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-19133 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-19133?
Check whether you run IBM Storage TS4500 Library at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: Storage TS4500 Library 1.12.0.4 Fix Pack or later

Technical details

The web UI and REST interfaces of IBM Storage TS4500 Library fail to properly enforce authorization checks when processing password modification requests. A lower-privileged authenticated user can exploit this improper authorization to modify another user's password, including higher-privileged accounts. The vulnerability requires an attacker to already be authenticated to the system (PR:L) and does not require user interaction; no fix availability is confirmed for versions prior to 1.12.0.4.

Affected products

  • IBM Storage TS4500 Library 1.1.1.6 through 1.12.0.3

Timeline

  • 2026-10-14: disclosed
  • 2026-11-08: advisory

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.