CVE-2026-87531: Infoleak
Chromium CVE-2026-87531: Information leak in CORS
Other sources
Information leak in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
— 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
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
Chromium-based (Google Chrome / Microsoft Edge)to 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 to obtain cross-origin data. The provided information does not describe exploitation by an unauthenticated web page alone.
Which Chrome versions need to be updated?
Google Chrome versions prior to 153.0.8010.36 are affected. Update Chrome to 153.0.8010.36 or a later version.
What data could be exposed?
A compromised renderer process could obtain cross-origin data through the CORS information leak. The provided information does not identify specific affected cross-origin resources or data types.