CVE-2026-3918
published 2026-03-11CVE-2026-3918: Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page…
PriorityP350high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.33%
24.9th percentile
Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| chromium | chromium | >= 0 < 146.0.7680.71-1~deb12u1 | 146.0.7680.71-1~deb12u1 |
| chromium | chromium | >= 0 < 146.0.7680.71-1~deb13u1 | 146.0.7680.71-1~deb13u1 |
| chromium | chromium | >= 0 < 146.0.7680.71-1 | 146.0.7680.71-1 |
| debian | chromium | < chromium 146.0.7680.71-1~deb12u1 (bookworm) | chromium 146.0.7680.71-1~deb12u1 (bookworm) |
| chrome | < 146.0.7680.71 | 146.0.7680.71 | |
| chrome | >= 146.0.7680.71 < 146.0.7680.71 | 146.0.7680.71 | |
| chrome_chrome | — | — | |
| msrc | microsoft_edge | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_debian8.8HIGH
vendor_msrc8.8HIGH
vendor_redhat8.8HIGH
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GHSA
GHSA-j53j-3fvf-64m5: Use after free in WebMCP in Google Chrome prior to 146
ghsa_unreviewed·2026-03-12
CVE-2026-3918 [HIGH] CWE-416 GHSA-j53j-3fvf-64m5: Use after free in WebMCP in Google Chrome prior to 146
Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
OSV
CVE-2026-3918: Use after free in WebMCP in Google Chrome prior to 146
osv·2026-03-11·CVSS 8.8
CVE-2026-3918 [HIGH] CVE-2026-3918: Use after free in WebMCP in Google Chrome prior to 146
Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Chrome
Stable Channel Update for ChromeOS / ChromeOS Flex: CVE-2026-3918
vendor_chrome·2026-03-24·CVSS 8.8
CVE-2026-3918 [HIGH] Stable Channel Update for ChromeOS / ChromeOS Flex: CVE-2026-3918
Stable Channel Update for ChromeOS / ChromeOS Flex
CVE-2026-3918
Red Hat
chromium-browser: Use after free in WebMCP
vendor_redhat·2026-03-10·CVSS 8.8
CVE-2026-3918 [HIGH] chromium-browser: Use after free in WebMCP
chromium-browser: Use after free in WebMCP
Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
An use after free flaw was found in the WebMCP component of the Chromium browser.
Upstream bug(s):
https://code.google.com/p/chromium/issues/detail?id=483853103
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Microsoft
Chromium: CVE-2026-3918 Use after free in WebMCP
vendor_msrc·2026-03-10·CVSS 8.8
CVE-2026-3918 [HIGH] Chromium: CVE-2026-3918 Use after free in WebMCP
Chromium: CVE-2026-3918 Use after free in WebMCP
Description: This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
FAQ: Why is this Chrome CVE included in the Security Update Guide?
The vulnerability assigned to this CVE is in Chromium Open Source Software (OSS) which is consumed by Microsoft Edge (Chromium-based). It is being documented in the Security Update Guide to announce that the latest version of Microsoft Edge (Chromium-based) is no longer vulnerable.
How can I see the version of the browser?
In your Microsoft Edge browser, click on the 3 dots (...) on the very right-hand side of the window
Click on Help and Feedback
Click on About Microsoft Edge
FAQ: What
Debian
CVE-2026-3918: chromium - Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remot...
vendor_debian·2026·CVSS 8.8
CVE-2026-3918 [HIGH] CVE-2026-3918: chromium - Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remot...
Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Scope: local
bookworm: resolved (fixed in 146.0.7680.71-1~deb12u1)
bullseye: open
forky: resolved (fixed in 146.0.7680.71-1)
sid: resolved (fixed in 146.0.7680.71-1)
trixie: resolved (fixed in 146.0.7680.71-1~deb13u1)
No detection rules found.
No public exploits indexed.
2026-03-11
Published