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PatchSiren cyber security CVE debrief

CVE-2026-78898 Google CVE debrief

CVE-2026-78898 is a Medium severity vulnerability in Google Chrome prior to version 152.0.7977.65, related to incorrect authorization in Downloads. This allows a remote attacker to bypass system access restrictions via a crafted HTML page, leveraging social engineering tactics. The vulnerability has a CVSS score of 5.4. Users of Google Chrome prior to version 152.0.7977.65, IT administrators responsible for Chrome updates, and security teams monitoring for potential social engineering attacks should be aware of this issue. The CVE record was published on 2026-08-25T21:17:47.183Z and has not been modified since then. Evidence from official CVE and NVD sources indicates a Medium severity vulnerability in Google Chrome prior to version 152.0.7977.65.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 5.4
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

Users of Google Chrome prior to version 152.0.7977.65, IT administrators responsible for Chrome updates, security teams monitoring for potential social engineering attacks, and operators of Chrome deployments in managed environments should be aware of this issue and take necessary actions.

Technical summary

The vulnerability, CVE-2026-78898, is related to incorrect authorization in Downloads in Google Chrome prior to version 152.0.7977.65. This allows a remote attacker to bypass system access restrictions via a crafted HTML page, leveraging social engineering tactics. The vulnerability has a CVSS score of 5.4 and is classified as Medium severity. It requires user interaction and has potential for limited impact.

Defensive priority

Medium severity vulnerability in Google Chrome, requiring user interaction, with potential for limited impact.

Recommended defensive actions

  • Apply the official patch to update Google Chrome to version 152.0.7977.65 or later.
  • Implement social engineering defenses and user awareness programs.
  • Monitor for suspicious activity and implement compensating controls.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

Evidence from official CVE and NVD sources indicates a Medium severity vulnerability in Google Chrome prior to version 152.0.7977.65. The vulnerability is related to incorrect authorization in Downloads, allowing a remote attacker to bypass system access restrictions via a crafted HTML page with social engineering.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78898 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78898

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

  • CVE-2026-78898 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78898

    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.