What is CVE-2026-72748?

CVE-2026-72748 is a critical-severity vulnerability in Wwbn Avideo, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-08-11.

How severe is CVE-2026-72748?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Wwbn Avideo

CVE-2026-72748

AVideo contains an unauthenticated arbitrary file write vulnerability in the aVideoEncoderChunk.json.php endpoint that allows remote attackers to write up to 4 GB of arbitrary content to the server filesystem via HTTP PUT requests without authentication. Attackers can exhaust disk space causing denial of service, poison the video encoding pipeline, or chain this with local file inclusion to achieve remote code execution.

Vulnerability class: Broken Authentication

Published 2026-08-11 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.6th percentile), scored 2026-09-25.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.012 · change: +0.005

Affected products

Wwbn Avideo — versions 29.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

github.com/WWBN/AVideo/security/advisories/GHSA-v7p7-jccx-h37c (vendor-advisory)
github.com/WWBN/AVideo/commit/1b55a9b3c4911d2f31594ce2e60566c70c6b95e8 (patch)
www.vulncheck.com/advisories/avideo-unauthenticated-arbitrary-file-write-via-av… (third-party-advisory)

Frequently asked questions

What is CVE-2026-72748?: CVE-2026-72748 is a critical-severity vulnerability in Wwbn Avideo, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-08-11.
How severe is CVE-2026-72748?: Critical severity. CVSS v3 base score is 9.1 out of 10.