# CVE-2026-82019

## Summary

- **CVE ID:** CVE-2026-82019
- **Severity:** LOW
- **CVSS Score:** 4.2 (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)
- **CWE:** CWE-79
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 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.

## Affected Products

- TripleLift — video-bundle.js (0)

## References

- [CNA](https://hussein-mahmoud7.medium.com/cve-2026-82019-how-a-random-ad-led-to-dom-xss-while-testing-chess-com-f043584e1e68)
- [CNA](https://triplelift.com/creative-technology/)
- [CNA](https://www.vulncheck.com/advisories/triplelift-video-bundle-js-dom-based-xss-via-postmessage)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.22%
- **EPSS Percentile:** 13.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._