PatchSiren cyber security CVE debrief
CVE-2026-84355 Google CVE debrief
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-02T00:18:29.417Z and has not been modified since then. The CVE-2026-84355 vulnerability is related to incorrect authorization in Navigation in Google Chrome prior to 152.0.7977.75. This issue allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. The Chromium security severity is Medium. The CVSS score is 3.1, indicating a relatively low severity. Google Chrome users, particularly those who use the browser for sensitive activities, should be aware of this vulnerability and take action to upgrade to a patched version. It is still important to address this issue as it could potentially allow an attacker to bypass web origin policy.
- Vendor
- Product
- Chrome
- CVSS
- LOW 3.1
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-09-02
- Original CVE updated
- 2026-09-03
- Advisory published
- 2026-09-02
- Advisory updated
- 2026-09-03
Who should care
Google Chrome users, particularly those who use the browser for sensitive activities, should be aware of this vulnerability and take action to upgrade to a patched version.
Technical summary
The CVE-2026-84355 vulnerability is related to incorrect authorization in Navigation in Google Chrome prior to 152.0.7977.75. This issue allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. The Chromium security severity is Medium. The CVSS score is 3.1, indicating a relatively low severity.
Defensive priority
This vulnerability has a low CVSS score of 3.1, indicating a relatively low severity. However, it is still important to address this issue as it could potentially allow an attacker to bypass web origin policy.
Recommended defensive actions
- Apply the patch: Upgrade Google Chrome to version 152.0.7977.75 or later.
- Inventory and verify: Check if Google Chrome is installed and if the version is prior to 152.0.7977.75.
- Monitor and detect: Monitor for potential exploitation attempts and detect anomalies in web traffic.
Evidence notes
The CVE-2026-84355 vulnerability is related to incorrect authorization in Navigation in Google Chrome prior to 152.0.7977.75. This issue allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. The Chromium security severity is Medium.
Sources and references
Verified primary and authoritative sources
-
CVE-2026-84355 CVE Program record
Publisher, destination, and source semantics verified
URL: https://www.cve.org/CVERecord?id=CVE-2026-84355
CVE Program - Official CVE Program record with source-provided CVE metadata.
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CVE-2026-84355 NVD vulnerability detail
Publisher, destination, and source semantics verified
URL: https://nvd.nist.gov/vuln/detail/CVE-2026-84355
NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.
Supplemental references
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Source reference
Unverified legacy reference
URL: https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop.html
[email protected] - Release Notes, Vendor Advisory
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Source reference
Unverified legacy reference
URL: https://issues.chromium.org/issues/511774376
[email protected] - Permissions Required
Methodology and review provenance
AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.