# CVE-2026-93954 — grimmory-tools grimmory

> As of 2026-09-19, CVE-2026-93954 is a MEDIUM-severity vulnerability in grimmory-tools grimmory, CVSS v3.1 4.3, EPSS 0.3% (31.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-93954 as of 2026-09-19; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-19

## What is CVE-2026-93954?

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.

The record classifies CVE-2026-93954 under weakness classes [CWE-863](https://intel.threadlinqs.com/cwe/CWE-863), [CWE-285](https://intel.threadlinqs.com/cwe/CWE-285). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 16 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 31.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-19

## Is CVE-2026-93954 being exploited?

It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **grimmory-tools**: grimmory

## How to fix CVE-2026-93954

No vendor patch reference has been recorded for CVE-2026-93954 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-93954

No threat campaign in the Threadlinqs corpus currently references CVE-2026-93954, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-20.

**Vendor advisory and patch**

- [github.com — issue tracking](https://github.com/grimmory-tools/grimmory/pull/2647)
- [github.com — patch](https://github.com/grimmory-tools/grimmory/commit/2b66ca6df8110f6b512e030b54c16b9fbe318f17)

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/grimmory-tools/grimmory/issues/2430)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/407913)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/407913/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-93954)
- [vuldb.com — third party advisory (943919)](https://vuldb.com/submit/943919)

**Issue tracking and product pages**

- [github.com — product](https://github.com/grimmory-tools/grimmory/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-93954
Full detection coverage and IOCs for threats exploiting CVE-2026-93954 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp