PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-17954 Google CVE debrief

A policy bypass vulnerability in MHTML in Google Chrome prior to 151.0.7922.72 allows a remote attacker to leak cross-origin data via a crafted MHTML page. This issue is considered to have a medium severity with a CVSS score of 4.3. The vulnerability affects Google Chrome installations and could lead to potential data leaks. Defenders should verify and update Google Chrome to version 151.0.7922.72 or later to prevent potential data leaks. The CVE record and NVD vulnerability detail page provide information on the policy bypass vulnerability in MHTML in Google Chrome. The Chromium security severity is considered Low. To address this vulnerability, defenders should prioritize updates

Vendor
Google
Product
Chrome
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-30
Original CVE updated
2026-10-23
Advisory published
2026-07-30
Advisory updated
2026-10-23

Who should care

Defenders responsible for managing and updating Google Chrome installations should prioritize verifying and updating to version 151.0.7922.72 or later to prevent potential data leaks.

Why it matters

Defenders should prioritize verifying and updating Google Chrome to version 151.0.7922.72 or later to prevent potential data leaks due to the policy bypass vulnerability in MHTML.

  • Data leaks due to cross-origin data exposure
  • Potential for unauthorized access to sensitive information
  • Need for verification and updates to Google Chrome

Technical summary

The policy bypass vulnerability in MHTML in Google Chrome prior to 151.0.7922.72 allows a remote attacker to leak cross-origin data via a crafted MHTML page. The CVSS score is 4.3, and the Chromium security severity is considered Low. This vulnerability affects Google Chrome installations and could lead to potential data leaks. To mitigate this vulnerability, defenders should verify and update Google Chrome to version 151.0.7922.72 or later. The update will help prevent potential data leaks due to the policy bypass vulnerability in MHTML. Additionally, defenders

Defensive priority

Defenders should prioritize verifying and updating Google Chrome to version 151.0.7922.72 or later to prevent potential data leaks.

Recommended defensive actions

  • Verify and update Google Chrome to version 151.0.7922.72 or later
  • Monitor Google Chrome for any potential security updates
  • Review and implement secure coding practices for MHTML pages

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the policy bypass vulnerability in MHTML in Google Chrome. The Chromium security severity is considered Low.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-17954 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-17954

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

  • CVE-2026-17954 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-17954

    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.