EUVD-2026-35256
GHSA-g324-4x5c-75c4
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionCVE.org
Use after free in ServiceWorker in Google Chrome prior to 149.0.7827.103 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: High)
AnalysisAI
Sandbox escape in Google Chrome versions prior to 149.0.7827.103 stems from a use-after-free condition in the ServiceWorker component, allowing an attacker to break out of Chrome's renderer sandbox through a crafted malicious extension. The flaw is rated Chromium severity High with CVSS 8.3 and no public exploit identified at time of analysis, but the scope-change (S:C) and full CIA impact mean a successful escape grants meaningful control over the host browser process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must install an attacker-controlled Chrome extension (UI:R in the CVSS vector), and that extension must execute crafted ServiceWorker code that drives the vulnerable allocation/free sequence to trigger the use-after-free - this is the explicit precondition stated in the description. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector AV:N/AC:H/PR:N/UI:R reflects a network-reachable but high-complexity bug that requires user interaction (installing a malicious extension), and the scope change with C:H/I:H/A:H is what drives the 8.3 score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker publishes or compromises a Chrome extension and convinces a target to install it via social engineering, a typosquatted listing, or a supply-chain takeover of a legitimate extension's developer account. Once installed, the extension issues crafted ServiceWorker operations that trigger the use-after-free, reclaim the freed allocation with attacker-controlled data, and pivot out of the extension sandbox into the broader Chrome process. … |
| Remediation | Update Chrome to version 149.0.7827.103 or later on the stable desktop channel - vendor-released patch is available per the Chrome Releases advisory (https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0153744567.html) and the Chromium issue tracker entry at https://issues.chromium.org/issues/513424000. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Inventory Chrome deployments and document current version distribution across the enterprise. …
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Vendor StatusVendor
SUSE
Severity: Critical| Product | Status |
|---|---|
| openSUSE Leap 16.0 | Fixed |
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
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