What is CVE-2026-100853?

CVE-2026-100853 is a medium-severity vulnerability in Azuracast, classified under Missing Authorization. CVSS score: 5.9/10. Published 2026-09-27.

How severe is CVE-2026-100853?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Azuracast

CVE-2026-100853

In AzuraCast before 0.23.8, the public On-Demand download endpoint fails to verify playlist-level access controls, allowing unauthenticated users to download media files excluded from On-Demand-enabled playlists. Attackers can bypass the station operator's intended access restrictions by directly requesting media via the download endpoint using valid media identifiers, exposing private or restricted audio content.

Vulnerability class: Broken Access Control

Published 2026-09-27.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Azuracast

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

github.com/AzuraCast/AzuraCast/security/advisories/GHSA-q9cc-mp52-vrp9 (vendor-advisory)
www.vulncheck.com/advisories/azuracast-before-0.23.8-on-demand-download-endpoin… (third-party-advisory)

Frequently asked questions

What is CVE-2026-100853?: CVE-2026-100853 is a medium-severity vulnerability in Azuracast, classified under Missing Authorization. CVSS score: 5.9/10. Published 2026-09-27.
How severe is CVE-2026-100853?: Medium severity. CVSS v3 base score is 5.9 out of 10.