CVE-2026-6300: Use after free in CSS
Chromium: CVE-2026-6300 Use after free in CSS
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 CSS in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
— 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
Chromium / Google Chrome (used by Microsoft Edge Chromium-based)to 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-2026-6299
- CVE-2026-6358
- CVE-2026-6359
- 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-2026-6300?
CVE-2026-6300 has a high severity score of 8.8 on the CVSS scale.
How do I fix CVE-2026-6300?
To fix CVE-2026-6300, update Google Chrome or Microsoft Edge to versions 147.0.7727.101 or later.
What types of software are affected by CVE-2026-6300?
CVE-2026-6300 affects Google Chrome and Microsoft Edge (Chromium-based) browsers.
What is the nature of the vulnerability in CVE-2026-6300?
CVE-2026-6300 is a use-after-free vulnerability in CSS that could allow remote code execution.
When was CVE-2026-6300 published?
CVE-2026-6300 was published on March 12, 2026.