EUVD-2026-65839
GHSA-fqgj-rwhh-459j
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Network-delivered browser exploit requiring only user navigation; confidentiality-only cross-origin read, no integrity or availability impact, no scope change.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
Externally controlled reference in QUIC in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Chrome's QUIC protocol implementation prior to version 152.0.7977.65 permits remote attackers to bypass the browser's web origin policy by directing a user to a crafted HTML page. The flaw is classified as CWE-610 (Externally Controlled Reference to a Resource in Another Sphere), meaning an attacker can influence a reference within the QUIC layer to access cross-origin resources that should be restricted. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to be running Google Chrome prior to version 152.0.7977.65 with QUIC enabled - QUIC is enabled by default in all standard Chrome configurations, so no special setup is needed on the victim's side. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N) describes a network-exploitable, low-complexity, unauthenticated attack requiring one user interaction step - navigating to a malicious page - with only partial confidentiality impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a crafted HTML page that triggers Chrome's QUIC layer to follow an externally-controlled reference to a cross-origin resource. When a victim using Chrome prior to 152.0.7977.65 visits or is redirected to that page, the same-origin policy bypass allows the attacker's page to read limited data from a normally-inaccessible origin. … |
| Remediation | Update Google Chrome to version 152.0.7977.65 or later, which resolves this vulnerability per the vendor advisory at https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Authentication Bypass
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External POC / Exploit Code
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