CVE-2026-82019CWE-79cross-site-scripting

CVE-2026-82019

Medium · published September 14, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
20.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
2.3 · 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
EPSS
0.00289 · 20.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-14T19:17Z
References (3)
https://hussein-mahmoud7.medium.com/cve-2026-82019-how-a-random-ad-led-to-dom-xss-while-testing-chess-com-f043584e1e68 · [email protected]https://triplelift.com/creative-technology/ · [email protected]https://www.vulncheck.com/advisories/triplelift-video-bundle-js-dom-based-xss-via-postmessage · [email protected]
EPSS history
Timeline
  • 17 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 14 SEP 14:10Z
    TripleLift video-bundle.js DOM-based XSS via postMessage
    cvelistv5