EUVD-2026-74339
GHSA-7hf9-x738-qv7h
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Prior renderer compromise is a substantial attack prerequisite that raises complexity to AC:H; all other metrics follow description and vendor vector directly.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
Lifecycle Timeline
6DescriptionCVE.org
Incorrect authorization in WebAppInstalls in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Incorrect authorization in the WebAppInstalls subsystem of Google Chrome before 153.0.8010.36 enables a remote attacker who has already compromised the renderer process to bypass Chrome's site isolation via a crafted HTML page combined with social engineering. This is a chained, second-stage exploit - not a standalone vulnerability - requiring a prior renderer compromise before the WebAppInstalls flaw can be weaponized. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two simultaneous prerequisites must be met: (1) the attacker must have already achieved code execution within a Chrome renderer process via a separate, independent renderer vulnerability - without this, the WebAppInstalls flaw is not reachable; (2) the victim must be actively socially engineered into visiting a crafted HTML page or interacting with a PWA installation prompt, satisfying the UI:R requirement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-supplied CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) captures the web-delivered, user-interaction-required nature but the AC:L metric materially understates exploitation complexity: the CVE description explicitly requires that the attacker has already compromised the renderer process, a non-trivial prerequisite that represents an independent exploit chain. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update Google Chrome to version 153.0.8010.36 or later, which resolves the WebAppInstalls authorization flaw per the vendor advisory at https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
Leaving vuln.today