CVE-2026-17954: Policy bypass in Google Chrome
A policy bypass vulnerability in the MHTML component of Google Chrome prior to version 151.0.7922.72 allows a remote attacker to leak cross-origin data by crafting a malicious MHTML page. The vulnerability is rated as medium severity with a CVSS score of 4.3. There are no known exploits in the wild. The vendor advisory linked suggests an update to Chrome 151.0.7922.72 to address this issue.
AI Analysis
Technical Summary
CVE-2026-17954 is a policy bypass vulnerability in Google Chrome's MHTML handling that permits remote attackers to leak cross-origin data via a specially crafted MHTML page. This vulnerability affects Chrome versions prior to 151.0.7922.72. The issue is classified under CWE-346 (Origin Validation Error). The CVSS v3.1 base score is 4.3, indicating a medium severity level. No public exploits have been reported. The vendor has released Chrome 151.0.7922.72 as a fixed version.
Potential Impact
Successful exploitation allows an attacker to bypass policy restrictions and leak cross-origin data, potentially exposing sensitive information from other origins. The impact is limited to confidentiality loss without integrity or availability impact. The vulnerability requires user interaction (UI:R) and can be exploited remotely without privileges.
Mitigation Recommendations
Users and administrators should update Google Chrome to version 151.0.7922.72 or later, where this vulnerability is fixed. The vendor advisory confirms the availability of this update. No additional mitigations are specified or required beyond applying the official patch.
CVE-2026-17954: Policy bypass in Google Chrome
Description
A policy bypass vulnerability in the MHTML component of Google Chrome prior to version 151.0.7922.72 allows a remote attacker to leak cross-origin data by crafting a malicious MHTML page. The vulnerability is rated as medium severity with a CVSS score of 4.3. There are no known exploits in the wild. The vendor advisory linked suggests an update to Chrome 151.0.7922.72 to address this issue.
CVSS v3.1
Score 4.3medium
Affected software
Chrome
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-17954 is a policy bypass vulnerability in Google Chrome's MHTML handling that permits remote attackers to leak cross-origin data via a specially crafted MHTML page. This vulnerability affects Chrome versions prior to 151.0.7922.72. The issue is classified under CWE-346 (Origin Validation Error). The CVSS v3.1 base score is 4.3, indicating a medium severity level. No public exploits have been reported. The vendor has released Chrome 151.0.7922.72 as a fixed version.
Potential Impact
Successful exploitation allows an attacker to bypass policy restrictions and leak cross-origin data, potentially exposing sensitive information from other origins. The impact is limited to confidentiality loss without integrity or availability impact. The vulnerability requires user interaction (UI:R) and can be exploited remotely without privileges.
Mitigation Recommendations
Users and administrators should update Google Chrome to version 151.0.7922.72 or later, where this vulnerability is fixed. The vendor advisory confirms the availability of this update. No additional mitigations are specified or required beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-07-27T23:37:07.514Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html","vendor":"Google"}]
Threat ID: 6a6aa0aa9c2644c7f849bb8f
Added to database: 07/30/2026, 00:54:02 UTC
Last enriched: 08/06/2026, 17:30:37 UTC
Last updated: 09/11/2026, 22:08:26 UTC
Views: 42
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