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 error occurs, the response is subsequently deserialized and its raw contents are reflected to the client in an error message; this enables an unauthenticated, remote attacker to read any arbitrary internal file reachable by the server. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.
References
History

Tue, 25 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-200

Tue, 25 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description 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 error occurs, the response is subsequently deserialized and its raw contents are reflected to the client in an error message; this enables an unauthenticated, remote attacker to read any arbitrary internal file reachable by the server. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.
Title CVE-2026-19913
References

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-08-25T16:36:42.889Z

Reserved: 2026-08-14T20:08:01.555Z

Link: CVE-2026-19913

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-25T17:17:09.163

Modified: 2026-08-25T17:17:09.163

Link: CVE-2026-19913

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-25T18:15:04Z