EUVD-2026-50835
GHSA-4xr6-2mhc-hp25
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Network-delivered via crafted page (AV:N) but requires winning a race plus a pre-existing renderer compromise, so AC:H; sandbox escape crosses a trust boundary (S:C) with total impact.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionCVE.org
Race in Downloads in Google Chrome on Mac prior to 151.0.7922.72 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 151.0.7922.72 lets a remote attacker who has already compromised the renderer process break out of the browser sandbox via a crafted HTML page that triggers a race condition in the Downloads component. Chromium rates it High severity and the CVSS is 9.6 (scope-changed). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the attacker has ALREADY compromised the renderer process (a prior renderer-RCE primitive is a hard prerequisite), the victim runs Chrome on macOS at a version below 151.0.7922.72, and the user loads/interacts with attacker-controlled content (CVSS UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The raw CVSS 3.1 score of 9.6 (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H) reflects a scope change and total impact, but that score is misleading in isolation because it presumes a fresh network attacker, whereas the description explicitly requires the attacker to have ALREADY compromised the renderer process - this is a second-stage sandbox-escape primitive, not a single-shot remote takeover. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker first exploits a separate renderer bug (e.g., a V8 or DOM flaw) to gain code execution inside Chrome's sandboxed renderer on a Mac, then serves a crafted HTML page that drives the Downloads code into its race window to escape the sandbox into the higher-privileged browser process. No public POC is identified at time of analysis, and the attack requires user interaction (UI:R) plus a working renderer compromise, so it fits targeted chain-based exploitation rather than opportunistic mass attacks. |
| Remediation | Vendor-released patch: Chrome 151.0.7922.72 - upgrade macOS Chrome to 151.0.7922.72 or later via the Stable Channel update (https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html), then fully relaunch the browser so the new binary is loaded, since Chrome applies updates only on restart. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Begin within 24 hours by assessing all macOS endpoints for Chrome versions below 151.0.7922.72 using chrome://settings/help, and enable auto-update on any systems where it is disabled. …
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
View allVendor StatusVendor
SUSE
Severity: Critical| Product | Status |
|---|---|
| SUSE Package Hub 15 SP7 | Fixed |
| openSUSE Leap 16.0 | Fixed |
| SUSE Package Hub 15 SP7 | Affected |
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External POC / Exploit Code
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