CVE-2026-1504: High Inappropriate implementation in Background Fetch API
Chromium: CVE-2026-1504 Inappropriate implementation in Background Fetch API
Other sources
Inappropriate implementation in Background Fetch API in Google Chrome prior to 144.0.7559.110 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
— MITRE
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-1504?
The severity of CVE-2026-1504 is classified as High according to Chromium security standards.
How do I fix CVE-2026-1504?
To fix CVE-2026-1504, update Google Chrome to version 144.0.7559.110 or later.
What type of attack does CVE-2026-1504 allow?
CVE-2026-1504 allows a remote attacker to leak cross-origin data via a crafted HTML page.
Which version of Google Chrome is affected by CVE-2026-1504?
Google Chrome versions prior to 144.0.7559.110 are affected by CVE-2026-1504.
What component of Google Chrome is involved in CVE-2026-1504?
CVE-2026-1504 involves an inappropriate implementation in the Background Fetch API.