Critical severity · published Aug 11, 2026
CVE-2026-72748
AVideo Unauthenticated Arbitrary File Write via aVideoEncoderChunk.json.php
9.1
CVSS
1.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AV
AVideo · WWBN
29.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72748
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72748
github.com
https://github.com/WWBN/AVideo/commit/1b55a9b3c4911d2f31594ce2e60566c70c6b95e8
github.com
https://github.com/WWBN/AVideo/security/advisories/GHSA-v7p7-jccx-h37c
www.vulncheck.com
https://www.vulncheck.com/advisories/avideo-unauthenticated-arbitrary-file-write-via-avideoencoderchunk-json-php
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