CVE-2026-93955
grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization
Description
A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue “has already been reported elsewhere.” No fixing commit or pull request is identified there.
INFO
Published Date :
Sept. 19, 2026, 10:15 p.m.
Last Modified :
Sept. 19, 2026, 10:15 p.m.
Remotely Exploit :
No
Source :
VulDB
Affected Products
The following products are affected by CVE-2026-93955
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update grimmory-tools to a patched version.
- Verify the patch addresses the streamFileToResponse flaw.
- Review access controls for the Download Endpoint.
- Monitor for further exploit attempts.
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CVE-2026-93955 vulnerability anywhere in the article.