# CVE-2026-66724 — CERT.PL MWDB Core

> As of 2026-07-29, CVE-2026-66724 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in CERT.PL MWDB Core, CVSS v4.0 5.3, EPSS 0.4% (36.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-66724, most recently “CVE-2026-66723: Missing Authorization in MWDB Core Remote Instances Proxy API”.

**Last updated:** 2026-07-29

## What is CVE-2026-66724?

MWDB Core versions >=2.0.0 and <2.19.0 contain a missing authorization vulnerability in the deprecated config and blob upload endpoints. These endpoints accept the undocumented POST method, which bypasses the capability checks applied to the documented PUT method. This allows any authenticated user without the adding_configs or adding_blobs capabilities to upload config and text blob objects to the system. The impact is limited to adding new config and blob objects. This issue has been fixed in version 2.19.0

The record classifies CVE-2026-66724 under weakness class [CWE-862](https://intel.threadlinqs.com/cwe/CWE-862). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 102 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 5.3 — Medium (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 36.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-29

## Is CVE-2026-66724 being exploited?

It currently carries a trending score of 26 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **CERT.PL**: MWDB Core

## How to fix CVE-2026-66724

Patch reference: [https://github.com/CERT-Polska/mwdb-core/releases/tag/v2.19.0](https://github.com/CERT-Polska/mwdb-core/releases/tag/v2.19.0). Vendor advisory: [https://cert.pl/en/posts/2026/07/CVE-2026-66723](https://cert.pl/en/posts/2026/07/CVE-2026-66723). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-66724

1 tracked threat in the Threadlinqs corpus references CVE-2026-66724, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CVE-2026-66723: Missing Authorization in MWDB Core Remote Instances Proxy API](https://intel.threadlinqs.com/threat/TL-2026-1821) — HIGH · 2026-07-29

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [cert.pl — vendor advisory](https://cert.pl/en/posts/2026/07/CVE-2026-66723)
- [github.com — vendor advisory](https://github.com/CERT-Polska/mwdb-core/security/advisories/GHSA-8fv8-wffg-4323)
- [github.com — patch](https://github.com/CERT-Polska/mwdb-core/releases/tag/v2.19.0)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-66724
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