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TI-2026-63213 Aliases CVE-2026-93954GHSA-h26m-rx2w-qwhg

Improper authorization in grimmory-tools grimmory

Priority MEDIUM 57CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

A security vulnerability has been detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected is the function AppSettingController.getAppSettings of the file backend/src/main/java/org/booklore/controller/AppSettingController.java of the component Settings API Endpoint. Such manipulation leads to incorrect authorization. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The name of the patch is 2b66ca6df8110f6b512e030b54c16b9fbe318f17. Applying a patch is advised to resolve this issue. PR #2558, merged as 53abc8b, moved the OIDC secret into a dedicated setting, but did not by itself restrict GET /api/v1/settings.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
grimmory-toolsgrimmory3.3.0; 3.3.1; 3.3.2; 3.3.3; 3.4.0; 3.4.1—No fix listedCNA
  • grimmory Vendorgrimmory-tools Affected 3.3.0; 3.3.1; 3.3.2; 3.3.3; 3.4.0; 3.4.1 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:grimmory-tools:grimmory:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:grimmory-tools:grimmory:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93954
  2. 2026-10-03 Alias added: GHSA-h26m-rx2w-qwhg

References

Exploit 1

Patch 2

Other 1

  • TI-2026-63214 grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization CVSS 4.0MEDIUM 5.3
  • TI-2026-30740 Grimmory: Stored XSS via Malicious EPUB Enables Session Token Theft CVSS 3.1MEDIUM 6.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences