CVE-2026-78961: Incorrect authorization in Core

Published Mar 28, 2026
·
Updated

Chromium: CVE-2026-78961 Incorrect authorization in Core

Other sources

Incorrect authorization in Core in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass web origin policy 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

Credit

Google

Affected Software

5 affected componentsFixes available
Google Google Chrome<152.0.7977.65
Google Chrome<152.0.7977.64
152.0.7977.64
Google Chrome<152.0.7977.65
Microsoft Edge<152.0.4191.53
Microsoft Edge (Chromium-based)<152.0.4191.53
152.0.4191.53

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 152.0.7977.64
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 152.0.4191.53
  3. Upgrade

    Upgrade Chromium/Google Chrome to a version that resolves this vulnerability.

    Fixed in 152.0.7977.65
  4. Compensating control

    Since Microsoft Edge (Chromium-based) ingests Chromium, ensure Edge is updated to a release that includes Chromium fix for CVE-2026-78961 (incorrect authorization in Core) to address the web-origin-policy bypass via crafted HTML from a compromised renderer.

Event History

Mar 28, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Aug 25, 2026
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software
Aug 28, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What must an attacker achieve before exploiting this issue?

The attacker must first compromise the Chrome renderer process and then use social engineering to get the victim to interact with a crafted HTML page. This is not described as a standalone attack against an uncompromised browser.

2

What security boundary can be bypassed?

Successful exploitation can bypass the web origin policy, allowing actions or access that should be restricted by same-origin isolation.

3

Which Chrome versions are affected?

Google Chrome versions prior to 152.0.7977.65 are affected. Updating to 152.0.7977.65 or later addresses the affected version range described.

Company

Resources

Contact

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