Vulnerability-Lookup

CVE-2026-19913 (GCVE-0-2026-19913)

Vulnerability from cvelistv5 – Published: 2026-08-25 16:21 – Updated: 2026-08-26 12:51

Title

CVE-2026-19913

Summary

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 12:51 UTC

CWE

CWE-20 Improper Input Validation
CWE-73 External Control of File Name or Path
CWE-20 - Improper Input Validation
CWE-73 - External Control of File Name or Path

Assigner

certcc mitre root

References

1 reference

URL	Tags
https://kb.cert.org/vuls/id/308749

Impacted products

1 product

Vendor	Product	Version	CPE status
Kaltura	Kaltura HTML5 Video Player, html5lib library	Affected: 0 , ≤ v2.103 (custom) Affected: 2.45	guessed

Show details on NVD website

JSON

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FKIE_CVE-2026-19913

Vulnerability from fkie_nvd - Published: 2026-08-25 17:17 - Updated: 2026-08-26 13:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	cret@cert.org	https://kb.cert.org/vuls/id/308749

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Kaltura HTML5 Video Player, html5lib library",
          "vendor": "Kaltura",
          "versions": [
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              "lessThanOrEqual": "v2.103",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "2.45"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
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GHSA-7HC5-VGHM-CR8H

Vulnerability from github – Published: 2026-08-25 18:31 – Updated: 2026-08-25 18:31

Details

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-19913"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T17:17:09Z",
    "severity": null
  },
  "details": "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\u2011HTTP 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.",
  "id": "GHSA-7hc5-vghm-cr8h",
  "modified": "2026-08-25T18:31:55Z",
  "published": "2026-08-25T18:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19913"
    },
    {
      "type": "WEB",
      "url": "https://kb.cert.org/vuls/id/308749"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-19913 (GCVE-0-2026-19913)

FKIE_CVE-2026-19913

GHSA-7HC5-VGHM-CR8H

Tags

Sightings

Nomenclature