CVE-2026-28640 Auth bypass in Android

What is CVE-2026-28640?

CVE-2026-28640 is a high-severity authentication bypass vulnerability in Google Android, published on 5 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In checkCallerIsCertInstallerOrSelfInProfile of CredentialStorageActivity.java, there is a possible permission bypass due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Weakness: CWE-20

Which versions are affected by CVE-2026-28640?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2026-28640?

No fix has been published for CVE-2026-28640 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-28640 being exploited?

There is no known exploitation of CVE-2026-28640 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-r6vj-5rj7-h2g4.