CVE-2026-78949 Information disclosure in Chrome

What is CVE-2026-78949?

CVE-2026-78949 is a low-severity vulnerability in Google Chrome, published on 25 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)

Weakness: CWE-203

Which versions are affected by CVE-2026-78949?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-78949?

Upgrade to a fixed version.

Is CVE-2026-78949 being exploited?

There is no known exploitation of CVE-2026-78949 in the wild and no public exploit code.

Other vulnerabilities in Google Chrome

• CVE-2022-4135 Google Chromium GPU Heap Buffer Overflow Exploited Critical 9.6
• CVE-2020-16017 Google Chrome Use-After-Free Exploited Critical 9.6
• CVE-2020-16010 Google Chrome for Android UI Heap Buffer Overflow Exploited Critical 9.6
• CVE-2026-87491 Google Chromium V8 Out of Bounds Write Exploited High 8.8
• CVE-2026-85046 Google Chromium V8 Type Confusion Exploited High 8.8

All Google Chrome vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2026-78949, ECHO-5e3b-54a8-7fe0, GHSA-5cvc-fgqj-75cw, MINI-rrm6-rv36-9jq3.