CVE-2026-17977: Policy bypass in Google Chrome
CVE-2026-17977 is a policy bypass vulnerability in the CSS implementation of Google Chrome versions prior to 151.0.7922.72. This flaw allows a remote attacker to leak cross-origin data by crafting a malicious HTML page. The vulnerability has a CVSS score of 4.3, indicating medium severity, and does not impact integrity or availability. No known exploits are reported in the wild. A vendor advisory is available but does not explicitly confirm patch status.
AI Analysis
Technical Summary
This vulnerability involves a policy bypass in CSS within Google Chrome before version 151.0.7922.72. It enables a remote attacker to leak cross-origin data by leveraging a crafted HTML page. The issue is classified under CWE-346 (Origin Validation Error). The CVSS 3.1 vector indicates the attack can be performed remotely without privileges, requires user interaction, and results in limited confidentiality impact without affecting integrity or availability.
Potential Impact
The impact is limited to confidentiality as the vulnerability allows leaking cross-origin data. There is no impact on data integrity or system availability. The CVSS score of 4.3 reflects this limited confidentiality exposure. No active exploitation in the wild has been reported.
Mitigation Recommendations
The vendor advisory linked suggests a stable channel update for Chrome but does not explicitly confirm the availability of a patch or remediation level. Since the affected version is prior to 151.0.7922.72, updating to version 151.0.7922.72 or later is recommended to address this vulnerability. Patch status is not explicitly confirmed; users should consult the vendor advisory for the latest remediation guidance.
CVE-2026-17977: Policy bypass in Google Chrome
Description
CVE-2026-17977 is a policy bypass vulnerability in the CSS implementation of Google Chrome versions prior to 151.0.7922.72. This flaw allows a remote attacker to leak cross-origin data by crafting a malicious HTML page. The vulnerability has a CVSS score of 4.3, indicating medium severity, and does not impact integrity or availability. No known exploits are reported in the wild. A vendor advisory is available but does not explicitly confirm patch status.
CVSS v3.1
Score 4.3medium
Affected software
Chrome
pkg:github/chromium/chromiumRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a policy bypass in CSS within Google Chrome before version 151.0.7922.72. It enables a remote attacker to leak cross-origin data by leveraging a crafted HTML page. The issue is classified under CWE-346 (Origin Validation Error). The CVSS 3.1 vector indicates the attack can be performed remotely without privileges, requires user interaction, and results in limited confidentiality impact without affecting integrity or availability.
Potential Impact
The impact is limited to confidentiality as the vulnerability allows leaking cross-origin data. There is no impact on data integrity or system availability. The CVSS score of 4.3 reflects this limited confidentiality exposure. No active exploitation in the wild has been reported.
Mitigation Recommendations
The vendor advisory linked suggests a stable channel update for Chrome but does not explicitly confirm the availability of a patch or remediation level. Since the affected version is prior to 151.0.7922.72, updating to version 151.0.7922.72 or later is recommended to address this vulnerability. Patch status is not explicitly confirmed; users should consult the vendor advisory for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-07-27T23:37:11.837Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html","vendor":"Google"}]
Threat ID: 6a6aa0ad9c2644c7f849bd29
Added to database: 07/30/2026, 00:54:05 UTC
Last enriched: 08/06/2026, 17:23:40 UTC
Last updated: 09/11/2026, 19:31:53 UTC
Views: 54
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