CVE-2026-93955
grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 CWE-285 |
| Vendor | grimmory-tools |
| Product | grimmory |
| Published | Sep 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
grimmory-tools / grimmory
3.3.0 3.3.1 3.3.2 3.3.3 3.4.0 3.4.1
References
vuldb.com: https://vuldb.com/vuln/407914 vuldb.com: https://vuldb.com/vuln/407914/cti vuldb.com: https://vuldb.com/cve/CVE-2026-93955 vuldb.com: https://vuldb.com/submit/943921 github.com: https://github.com/grimmory-tools/grimmory/issues/2431 github.com: https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858 github.com: https://github.com/grimmory-tools/grimmory/
Credits
🔍 summmm (VulDB User) VulDB CNA Team