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AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
4DescriptionCVE.org
Out of bounds write in Skia in Google Chrome on Mac prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
AnalysisAI
Sandbox escape in Google Chrome on macOS prior to 149.0.7827.53 lets a remote attacker who has already compromised the renderer process break out of the Chromium sandbox via a crafted HTML page that triggers an out-of-bounds write in Skia. Google rates the underlying Chromium issue High severity and a vendor patch is available, though no public exploit code has been identified at time of analysis.
Technical ContextAI
Skia is the 2D graphics library that Chromium uses to rasterize HTML, CSS, and Canvas content; on macOS portions of Skia run inside higher-privileged GPU/browser processes that are reachable from the renderer through Mojo IPC. CWE-787 (Out-of-bounds Write) indicates the flaw writes attacker-controlled data past an intended buffer boundary inside Skia, which on a process with broader macOS entitlements than the sandboxed renderer can be leveraged to corrupt memory and pivot out of the sandbox. The bug is macOS-specific per the description, suggesting the affected code path or memory layout is unique to the Mac build of Chrome/Skia rather than a cross-platform Skia defect.
RemediationAI
Vendor-released patch: update Google Chrome on macOS to 149.0.7827.53 or later via the Stable channel as described in the Chrome Releases advisory (https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html); the underlying Chromium tracker is https://issues.chromium.org/issues/500071763. Because the bug requires a pre-existing renderer compromise, interim compensating controls include enforcing Chrome auto-update via MDM, deploying Site Isolation and the macOS-specific 'enable-features=MacSyscallSandbox' hardening already on by default, and restricting high-risk browsing through a separate browser profile or per-site renderer isolation policy; trade-offs are minimal beyond the brief restart required for the update. Operators of Chromium-derived browsers should pull the corresponding Skia fix once their upstream merges land and re-image any macOS endpoint where a renderer compromise is already suspected, since sandbox escape implies the host may already be fully attacker-controlled.
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
View allVendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-34374
GHSA-jpc8-5g78-vg34