CVE-2026-6299: Use after free in Prerender
Chromium: CVE-2026-6299 Use after free in Prerender
Other sources
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
Use after free in Prerender in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
— MITRE
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 147.0.7727.101 - Upgrade
Upgrade
Microsoft Edge (Chromium-based) / Chromiumto a version that resolves this vulnerability.Fixed in 147.0.7727.101
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-6296
- CVE-2026-6297
- CVE-2026-6298
- CVE-2026-6358
- CVE-2026-6359
- CVE-2026-6300
- CVE-2026-6301
- CVE-2026-6302
- CVE-2026-6303
- CVE-2026-6304
- CVE-2026-6305
- CVE-2026-6306
- CVE-2026-6307
- CVE-2026-6308
- CVE-2026-6309
- CVE-2026-6360
- CVE-2026-6310
- CVE-2026-6311
- CVE-2026-6312
- CVE-2026-6313
- CVE-2026-6314
- CVE-2026-6315
- CVE-2026-6316
- CVE-2026-6361
- CVE-2026-6362
- CVE-2026-6317
- CVE-2026-6363
- CVE-2026-6318
- CVE-2026-6319
- CVE-2026-6364
Frequently Asked Questions
What is the severity of CVE-2026-6299?
CVE-2026-6299 is classified as a high severity vulnerability due to its potential to allow attackers to exploit the use after free condition.
How do I fix CVE-2026-6299?
To resolve CVE-2026-6299, users should update Google Chrome to version 147.0.7727.101 or higher, or update Microsoft Edge (Chromium-based) to the latest version.
Which software is affected by CVE-2026-6299?
CVE-2026-6299 affects Google Chrome prior to version 147.0.7727.101 and Microsoft Edge (Chromium-based) prior to the latest available version.
What is a use after free vulnerability like CVE-2026-6299?
A use after free vulnerability occurs when a program continues to use a pointer after the memory it points to has been freed, potentially leading to arbitrary code execution.
How do I check if I am vulnerable to CVE-2026-6299?
To check for vulnerability to CVE-2026-6299, verify that your installed version of Google Chrome or Microsoft Edge is updated to the recommended version or higher.