EUVD-2026-65997
GHSA-4fvf-46cq-3pw2
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Network delivery requiring active victim navigation (UI:R), no attacker authentication needed, partial confidentiality leak only with no integrity or availability impact and 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
Information leak in ServiceWorker in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Cross-origin data exposure via a ServiceWorker flaw in Google Chrome prior to 152.0.7977.65 permits remote attackers to read data from origins they do not control. An attacker can exploit this by delivering a crafted HTML page to a victim user, leveraging Chrome's ServiceWorker API to bypass same-origin isolation and exfiltrate cross-origin responses. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an unpatched version of Google Chrome (prior to 152.0.7977.65) and active user interaction: the victim must navigate to the attacker's crafted HTML page (UI:R per CVSS), making passive network interception insufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.3 score accurately reflects the constrained scope: confidentiality-only partial impact (C:L), no scope change (S:U), and a mandatory user-interaction prerequisite (UI:R) that eliminates purely opportunistic or automated mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a malicious web page containing JavaScript that registers a crafted ServiceWorker designed to intercept cross-origin fetch requests and relay response data back to an attacker-controlled endpoint. A victim using an unpatched Chrome browser navigates to the attacker's page - via a phishing link, malvertising, or a compromised third-party site - triggering the ServiceWorker registration, after which cross-origin data accessible in that browsing context leaks to the attacker. … |
| Remediation | The primary remediation is upgrading Google Chrome to version 152.0.7977.65 or later, as documented in the Chrome stable channel 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 weakness CWE-200 – Information Exposure
View allSame technique Information Disclosure
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External POC / Exploit Code
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