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CVE-2026-82019— TripleLift video-bundle.js DOM-based XSS via postMessage

Quick assessment

Affected
TripleLift video-bundle.js
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.

TripleLift 的广告渲染脚本（video-bundle.js）中存在基于 DOM 的跨站脚本（XSS）漏洞。该漏洞允许未经身份验证的攻击者通过发送精心构造的 消息负载，且由于缺少源验证，从而在发布商（publisher）的域名下执行任意 JavaScript 代码。攻击者可以诱导受害者访问一个由攻击者控制的页面，该页面向正在运行广告脚本的发布商页面发送恶意的 事件，从而实现会话劫持和非授权的 DOM 操作。

CVSS 4.2 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-82019

Vulnerability Information
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Vulnerability Title
TripleLift video-bundle.js DOM-based XSS via postMessage
Source: CVE Program / CVE List V5
Vulnerability Description
TripleLift's ad rendering script (video-bundle.js) contains a DOM-based cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in a publisher's domain by sending crafted postMessage payloads without origin validation. Attackers can cause a victim to visit an attacker-controlled page that sends malicious postMessage events to a publisher page running the ad script, enabling session hijacking and unauthorized DOM manipulation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TripleLift video-bundle.js 0 ~ 2026-04-28 -

II. Public POCs for CVE-2026-82019

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-82019

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Vendor Advisories for CVE-2026-82019 (1)

Vendor Pages for CVE-2026-82019 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-82019

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