CVE-2026-17859: Side-channel information leakage in Google Chrome
A side-channel information leakage vulnerability exists in Google Chrome versions prior to 151.0.7922.72. This flaw involves the inappropriate implementation of Favicons, allowing a remote attacker to leak cross-origin data via a crafted HTML page. The vulnerability has a medium severity rating with a CVSS score of 4.3. No known exploits are reported in the wild. The vendor advisory does not explicitly confirm a patch or remediation status.
AI Analysis
Technical Summary
CVE-2026-17859 is a side-channel information leakage vulnerability in Google Chrome affecting versions before 151.0.7922.72. The issue arises from improper handling of Favicons, which enables a remote attacker to leak cross-origin data by crafting a malicious HTML page. The vulnerability is classified under CWE-346 (Origin Validation Error) and has a CVSS 3.1 base score of 4.3, indicating medium severity. There is no explicit vendor advisory statement confirming a patch or remediation level, and no known exploits have been reported.
Potential Impact
An attacker can remotely leak cross-origin data through a crafted HTML page exploiting the favicon handling flaw. This could lead to unauthorized disclosure of information across origins, but does not affect integrity or availability. The impact is limited to confidentiality with no known active exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html for current remediation guidance. Until an official fix is confirmed, users should apply updates promptly once available and exercise caution with untrusted web content.
CVE-2026-17859: Side-channel information leakage in Google Chrome
Description
A side-channel information leakage vulnerability exists in Google Chrome versions prior to 151.0.7922.72. This flaw involves the inappropriate implementation of Favicons, allowing a remote attacker to leak cross-origin data via a crafted HTML page. The vulnerability has a medium severity rating with a CVSS score of 4.3. No known exploits are reported in the wild. The vendor advisory does not explicitly confirm a patch or remediation 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
CVE-2026-17859 is a side-channel information leakage vulnerability in Google Chrome affecting versions before 151.0.7922.72. The issue arises from improper handling of Favicons, which enables a remote attacker to leak cross-origin data by crafting a malicious HTML page. The vulnerability is classified under CWE-346 (Origin Validation Error) and has a CVSS 3.1 base score of 4.3, indicating medium severity. There is no explicit vendor advisory statement confirming a patch or remediation level, and no known exploits have been reported.
Potential Impact
An attacker can remotely leak cross-origin data through a crafted HTML page exploiting the favicon handling flaw. This could lead to unauthorized disclosure of information across origins, but does not affect integrity or availability. The impact is limited to confidentiality with no known active exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html for current remediation guidance. Until an official fix is confirmed, users should apply updates promptly once available and exercise caution with untrusted web content.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-07-27T23:35:06.081Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html","vendor":"Google"}]
Threat ID: 6a6aa09b9c2644c7f849b70c
Added to database: 07/30/2026, 00:53:47 UTC
Last enriched: 08/06/2026, 17:44:36 UTC
Last updated: 09/12/2026, 22:01:31 UTC
Views: 38
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