Cube Core is vulnerable to Denial of Service (DoS) via crafted request
Date: 2026-02
Affected: npm/@cubejs-backend/server-core, npm/@cubejs-backend/server-core
Attack vector: dos
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-25957
CWE: CWE-755
CVSS: 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

### **Impact** It is possible to make the entire Cube API unavailable by submitting a specially crafted request to a Cube API endpoint. ### Affected Versions: `>= 1.1.17` ### Mitigation: Upgrade to a patched version: - 1.5.13 and later (regular release) - 1.4.2 (active [LTS release](https://cube.dev/docs/product/administration/distribution#long-term-support)) ### **References** The issue was reported by our Core engineer, Dmitrii Patsura (@ovr), in our internal Slack and was promptly patched in a recent update.


Mitigations:

Architectural layers (MAESTRO):