CVE-2026-19912

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{"affected": [{"affectedData": [{"product": "Kaltura HTML5 Video Player, html5 library", "vendor": "Kaltura", "versions": [{"lessThanOrEqual": "v2.103", "status": "affected", "version": "0", "versionType": "custom"}, {"status": "affected", "version": "2.45"}]}], "source": "cret@cert.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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\u2011controlled ServiceUrl, whose response is passed to unserialize(), and the resulting object\u2019s fields are written to a cache path derived from attacker\u2011supplied uiconf_id without proper path validation. An attacker can write arbitrary files into web\u2011accessible 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."}], "id": "CVE-2026-19912", "lastModified": "2026-09-03T17:38:29.613", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-19912", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-01T18:23:34.720113Z", "version": "2.0.3"}}]}, "published": "2026-08-25T17:17:07.263", "references": [{"source": "cret@cert.org", "url": "https://kb.cert.org/vuls/id/308749"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-22"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"created": "2026-08-25T17:30:07.652811+00:00", "title": "Remote Code Execution via Deserialization in Kaltura HTML5 Player", "updated": "2026-09-02T07:15:04.776045+00:00", "vendors": []}