CVE-2026-82019
TripleLift video-bundle.js DOM-based XSS via postMessage
- State
- Published
- Severity
- 2.3 Low
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Reserved
- Aug 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.3 Low | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 4.2 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
video-bundle.jsTripleLift |
|
References
- Researcher Blogtechnical-descriptionexploit
- Vendor Webpageproduct
- https://www.vulncheck.com/advisories/triplelift-video-bundle-js-dom-based-xss-via-postmessagethird-party-advisory
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