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 · last modified .
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
EPSS: 0.003 (24.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-q9cc-mp52-vrp9) (vendor-advisory)
- VulnCheck Advisory: AzuraCast before 0.23.8 On-Demand Download Endpoint Authorization Bypass (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.