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Critical · 9.8 Public exploit CVE-2026-19912 EUVD-2026-65614GHSA-537c-gp6x-jr7q

CVE-2026-19912

Published Aug 25, 2026 · Updated Sep 1, 2026 · Assigned by certcc

Vendor: Kaltura Product: Kaltura HTML5 Video Player, html5 library

Description

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 resulting object’s fields are written to a cache path derived from attacker‑supplied uiconf_id without proper path validation. An attacker can write arbitrary files into web‑accessible locations and achieve code execution as the webserver user. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.

Affected products

VendorProductAffectedFixed
Kaltura Kaltura HTML5 Video Player, html5 library ≤ v2.103, 2.45 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References