CVE-2026-19913

A flaw was found in the Kaltura HTML5 player mwEmbed / html5lib. An unauthenticated, remote attacker can exploit improper validation of the ServiceUrl parameter in mwEmbedLoader.php. This parameter, used for backend requests, accepts non-HTTP schemes such as file://. When an exception or error...

Unpatched Kaltura mwEmbed Flaws Could Let Remote Attackers Read Files and Run Code

The CERT Coordination Center CERT/CC has disclosed two unpatched vulnerabilities in Kaltura's HTML5 video player library that allow a remote, unauthenticated attacker to read arbitrary files from a server and execute code on it. The flaws, tracked as CVE-2026-19913 and CVE-2026-19912 , both stem...

CVE-2026-19913

The Kaltura HTML5 player mwEmbed / html5lib contains a local file disclosure vulnerability due to improper validation of the ServiceUrl parameter in mwEmbedLoader.php. This parameter is used as the base URL for a backend request and accepts non‑HTTP schemes such as file://. When an exception or...

CVE-2026-19912

The Kaltura HTML5 player mwEmbed / html5lib contains an unauthenticated remote code execution vulnerability caused by unsafe data deserialization and unsanitized filesystem path construction. mwEmbedLoader.php accepts a user‑controlled ServiceUrl, whose response is passed to unserialize, and the...

CVE-2026-19913 CVE-2026-19913

The Kaltura HTML5 player mwEmbed / html5lib contains a local file disclosure vulnerability due to improper validation of the ServiceUrl parameter in mwEmbedLoader.php. This parameter is used as the base URL for a backend request and accepts non‑HTTP schemes such as file://. When an exception or...

EUVD-2026-65615

The Kaltura HTML5 player mwEmbed / html5lib contains a local file disclosure vulnerability due to improper validation of the ServiceUrl parameter in mwEmbedLoader.php. This parameter is used as the base URL for a backend request and accepts non‑HTTP schemes such as file://. When an exception or...

CVE-2026-19912

The Kaltura HTML5 player (mwEmbed / html5lib) is vulnerable to unauthenticated remote code execution (RCE) in versions html5lib v2.45, v2.103, and earlier , as well as other v2.x releases. The root cause is unsafe data deserialization via the mwEmbedLoader.php endpoint, which processes a user-con...

EUVD-2026-65614

The Kaltura HTML5 player mwEmbed / html5lib contains an unauthenticated remote code execution vulnerability caused by unsafe data deserialization and unsanitized filesystem path construction. mwEmbedLoader.php accepts a user‑controlled ServiceUrl, whose response is passed to unserialize, and the...

PT-2026-81394

Name of the Vulnerable Software and Affected Versions html5lib versions 2.x and earlier Description The Kaltura HTML5 player mwEmbed / html5lib contains an unauthenticated remote code execution issue resulting from unsafe data deserialization and unsanitized filesystem path construction. The...

PT-2026-81395

Name of the Vulnerable Software and Affected Versions Kaltura HTML5 player mwEmbed / html5lib versions 2.x and earlier Description A local file disclosure issue exists due to improper validation of the ServiceUrl parameter in the 'mwEmbedLoader.php' endpoint. This parameter, intended as the base...

Remote Code Execution and Arbitrary File Read Vulnerabilities in Kaltura Servers

Overview The Kaltura HTML5 Player V2 Library mwEmbed / html5lib contains two vulnerabilities, both involving the same insecure deserialization flaw, that enable arbitrary file read and remote code execution. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases tha...