CVE-2026-87434: Low severity Google Google Chrome vulnerability
Chromium CVE-2026-87434: Missing authorization in CORS
Other sources
Missing authorization in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
— NVD
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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.0.4234.32 - Upgrade
Upgrade
Google Chrome / Chromiumto a version that resolves this vulnerability.Fixed in 153.0.8010.36
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attacker must already have compromised the Chrome renderer process and then use a crafted HTML page. The provided information does not indicate that a remote attacker can exploit this vulnerability without renderer-process compromise.
Which Chrome versions are affected?
Google Chrome versions prior to 153.0.8010.36 are affected. Updating to 153.0.8010.36 or later addresses the affected version range.
What security boundary can be bypassed?
A successful exploit can bypass the web origin policy through missing authorization in CORS. This could allow a compromised renderer to access cross-origin resources contrary to normal browser origin restrictions.