CVE-2026-9124: Insufficient validation of untrusted input in Input
Chromium: CVE-2026-9123 Heap buffer overflow in Chromecast
Other sources
Insufficient validation of untrusted input in Input in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker who had compromised the renderer process to leak cross-origin data 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
Credit
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 148.0.7778.178 - Upgrade
Upgrade
Chromium (Google Chrome/Edge Chromium-based)to a version that resolves this vulnerability.Fixed in 148.0.7778.179Patch CVE-2026-9123
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the risk level of CVE-2026-9124?
CVE-2026-9124 has a risk level of 23 and a medium severity rating of 5.3.
How do I fix CVE-2026-9124?
To fix CVE-2026-9124, update Google Chrome or Microsoft Edge to version 148.0.7778.179 or later.
What affects users at risk from CVE-2026-9124?
Users of Google Chrome and Microsoft Edge prior to version 148.0.7778.179 are at risk from CVE-2026-9124.
What type of vulnerability is CVE-2026-9124?
CVE-2026-9124 is classified as an input validation vulnerability leading to heap buffer overflow.
What kind of attack does CVE-2026-9124 enable?
CVE-2026-9124 allows a remote attacker to leak cross-origin data via a crafted HTML page.