TripleLift video-bundle.js DOM-based XSS via postMessage (CVE-2026-82019) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-82019

TripleLift video-bundle.js DOM-based XSS via postMessage

Answer in brief

CVE-2026-82019 records a Unknown severity vulnerability in TripleLift video-bundle.js DOM-based XSS via postMessage. The current sources do not mark it as known exploited. The current feed maps TripleLift/video-bundle.js (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 14, 2026Updated Sep 14, 2026Source checked Sep 14, 2026First seen by HOL Sep 14, 2026Material review Sep 14, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TripleLift/video-bundle.js (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
TripleLift/video-bundle.jsgeneric	>=0 <2026-04-28	2026-04-28

Recommended response

Check inventory. Check lockfiles and deployed manifests for TripleLift/video-bundle.js.
Review the reported fix. Update TripleLift/video-bundle.js to 2026-04-28 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 14, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.