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CVE-2026-78941 Google CVE debrief

Information leak in Core in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. This vulnerability, tracked as CVE-2026-78941, poses a Low severity risk with a CVSS score of 3.1. The issue is confined to the Core component of Google Chrome, enabling an attacker to bypass site isolation through a specifically designed HTML page. Organizations and individuals using Google Chrome should ensure their browsers are updated to version 152.0.7977.65 or later to mitigate potential risks. The vulnerability was publicly disclosed on August 25, 2026, and there have been no modifications to the CVE record since its publication.

Vendor
Google
Product
Chrome
CVSS
LOW 3.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-25
Original CVE updated
2026-08-31
Advisory published
2026-08-25
Advisory updated
2026-08-31

Who should care

Organizations and individuals using Google Chrome for browsing should be aware of this vulnerability and ensure their browsers are updated to version 152.0.7977.65 or later to mitigate potential risks. IT and security teams responsible for Chrome deployments should prioritize this update and review site isolation configurations.

Technical summary

The vulnerability, CVE-2026-78941, is an information leak in the Core component of Google Chrome prior to version 152.0.7977.65. This issue allows a remote attacker who has compromised the renderer process to bypass site isolation via a crafted HTML page. The CVSS score for this vulnerability is 3.1, indicating a Low severity level. Affected systems should be updated to prevent potential information leaks.

Defensive priority

Low-priority defensive review recommended due to limited attack surface.

Recommended defensive actions

  • Review and apply Google Chrome updates to ensure version 152.0.7977.65 or later is deployed.
  • Monitor for suspicious activity related to crafted HTML pages.
  • Verify site isolation configurations in Google Chrome.
  • Perform a security audit of Chrome deployments to identify potential exposure.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

Evidence from official CVE and NVD sources indicates an information leak vulnerability in Google Chrome Core, with a CVSS score of 3.1 and severity labeled as LOW. The vulnerability allows a remote attacker who has compromised the renderer process to bypass site isolation via a crafted HTML page. Defenders should verify Chrome version and site isolation configurations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78941 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78941

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-78941 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78941

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

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.