CVE-2026-122081: Composer/drupal/islandora vulnerability
Islandora does not sufficiently check file update access when processing media source and derivative uploads. A user with permission to update media or create derivatives can submit a crafted request to overwrite files they are not authorized to modify, including private files.
The Islandora Text Extraction submodule also bypasses shared destination URI and file extension validation when attaching OCR output.
This vulnerability is mitigated by the fact that an attacker must have permission to update media or to update a node and create media.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
composer/drupal/islandorato a version that resolves this vulnerability.Fixed in 2.19.1
Event History
Frequently Asked Questions
Who is realistically exposed to exploitation?
Installations are exposed where a user has permission to update media, or has permission to update a node and create media. Such a user may be able to overwrite files they are not authorized to modify, including private files.
What access does an attacker need?
The attacker must be authenticated with permission to update media, or with both permission to update a node and create media. The vulnerability is mitigated by this permission requirement.
Does the Text Extraction submodule introduce additional risk?
Yes. When attaching OCR output, the Islandora Text Extraction submodule bypasses shared destination URI and file-extension validation.