PatchGap
Chrome · Canvas

CVE-2026-13840

Policy Bypass in Canvas
High CVSS 6.5 chrome Policy Bypass

Overview

High
Severity
6.5
CVSS
No
Exploited ITW
Embargoed
Fix Status
ImpactInsufficient policy enforcement in Canvas
DescriptionInsufficient policy enforcement in Canvas
ComponentCanvas
Bug ClassPolicy Bypass
Tracker514609778
CWECWE-346 (Origin validation error)
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA KEVNot listed
CreditedBinglin Song
Reported2026-05-19 (per vendor advisory)
Disclosed2026-06-30

Fix not yet public

No public source fix for this bug has been identified on the main branch yet — it is embargoed or not yet disclosed. Root-cause analysis is withheld until the fix commit is available.

Original Bug Report

The reporter's bug is still restricted on the tracker. Chrome de-restricts security bugs ~30–90 days after the fix ships; a later run will backfill it here.
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