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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00188.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Kaltura Kaltura HTML5 Video Player, html5lib library affected
Version Status Constraints
0 affected ≤ v2.103
2.45 affected —

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://kb.cert.org/vuls/id/308749 cve-icon cve-icon
History

Wed, 26 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22

Wed, 26 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-73
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 26 Aug 2026 03:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22

Tue, 25 Aug 2026 20:15:00 +0000

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

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-08-26T12:51:16.017Z

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

Link: CVE-2026-19913

cve-icon Vulnrichment

Updated: 2026-08-26T12:50:53.435Z

cve-icon NVD

Status : Received

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

Modified: 2026-08-26T13:17:47.880

Link: CVE-2026-19913

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T17:30:10Z

Weaknesses