CVE WatchSep 19, 2026

CVE-2026-93955

A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToRespon

CVSS

4.3

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 19, 2026 · Last modified: Sep 19, 2026 · CWE-285 · CWE-639

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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