CVE-2026-19912
Quick assessment
Affected
Kaltura Kaltura HTML5 Video Player, html5 library
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Kaltura HTML5 播放器（mwEmbed / html5lib）存在一个未认证的远程代码执行漏洞，该漏洞由不安全的反序列化操作和未经验证的文件系统路径构造所导致。mwEmbedLoader.php 会接受用户可控的 ServiceUrl 参数，并将其响应直接传递给 unserialize() 函数进行反序列化。反序列化后生成的对象字段会被写入一个缓存路径，该路径由攻击者提供的 uiconf_id 拼接而成，且未进行正确的路径校验。攻击者可利用此漏洞将任意文件写入 Web 可访问目录，并以 Web 服务器用
In-the-Wild Activity Observed
github_trending · low
Possible ATT&CK Techniques 3 AI
T1055 · Process Injection T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Kaltura | Kaltura HTML5 Video Player, html5 library | ≤ v2.103 |
affected |
2.45 |
affected |
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I. Basic Information for CVE-2026-19912
Vulnerability Information
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Vulnerability Title
CVE-2026-19912
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Kaltura | Kaltura HTML5 Video Player, html5 library | 0 ~ v2.103 | - |
|
II. Public POCs for CVE-2026-19912
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-19912 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-19912
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