CVE-2026-93955grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization
Updated under an hour ago ()
Does this affect you?
It affects grimmory-tools grimmory. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)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
- Weakness (CWE)
- CWE-639, CWE-285
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
grimmory-tools grimmory grimmory-tools:grimmory | 3.3.0; 3.3.1; 3.3.2; 3.3.3; 3.4.0; 3.4.1 | CNA record |
References
- https://vuldb.com/vuln/407914vdb-entry, technical-description
- https://vuldb.com/vuln/407914/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-93955third-party-advisory
- https://vuldb.com/submit/943921third-party-advisory
- https://github.com/grimmory-tools/grimmory/issues/2431exploit, issue-tracking
- https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858issue-tracking
- https://github.com/grimmory-tools/grimmory/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.