XSS in Triplelift Video-Bundle.js

CVE-2026-82019

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-82019?
CVE-2026-82019 is a medium-severity vulnerability in Triplelift Video-Bundle.js, classified under Cross-site Scripting. CVSS score: 4.2/10. Published 2026-09-14.
How severe is CVE-2026-82019?
Medium severity. CVSS v3 base score is 4.2 out of 10.