CVE-2026-13889: Insufficient validation of untrusted input in Google Chrome
Side-channel information leakage in WebAuthentication in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
AI Analysis
Technical Summary
This vulnerability (CVE-2026-13889) affects Google Chrome on iOS versions before 150.0.7871.47. It arises from insufficient validation of untrusted input in the WebAuthentication API, which leads to a side-channel information leak. An attacker can craft a malicious HTML page that causes leakage of cross-origin data, violating the same-origin policy. The CVSS 3.1 score is 6.5 (medium), with attack vector network, low attack complexity, no privileges required, user interaction required, and impact limited to confidentiality. The vendor advisory linked does not explicitly confirm patch availability or remediation level, so patch status is not yet confirmed.
Potential Impact
The vulnerability allows remote attackers to leak sensitive cross-origin information via a side-channel attack in the WebAuthentication component of Chrome on iOS. This compromises confidentiality but does not affect integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users and administrators should monitor the official Chrome release notes and update to version 150.0.7871.47 or later once confirmed. No specific temporary mitigations are indicated.
CVE-2026-13889: Insufficient validation of untrusted input in Google Chrome
Description
Side-channel information leakage in WebAuthentication in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/google/chrome-iosRun 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 (CVE-2026-13889) affects Google Chrome on iOS versions before 150.0.7871.47. It arises from insufficient validation of untrusted input in the WebAuthentication API, which leads to a side-channel information leak. An attacker can craft a malicious HTML page that causes leakage of cross-origin data, violating the same-origin policy. The CVSS 3.1 score is 6.5 (medium), with attack vector network, low attack complexity, no privileges required, user interaction required, and impact limited to confidentiality. The vendor advisory linked does not explicitly confirm patch availability or remediation level, so patch status is not yet confirmed.
Potential Impact
The vulnerability allows remote attackers to leak sensitive cross-origin information via a side-channel attack in the WebAuthentication component of Chrome on iOS. This compromises confidentiality but does not affect integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users and administrators should monitor the official Chrome release notes and update to version 150.0.7871.47 or later once confirmed. No specific temporary mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-06-29T23:03:42.994Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html","vendor":"Google"}]
Threat ID: 6a444c1b27e9c7971985cbe2
Added to database: 06/30/2026, 23:07:07 UTC
Last enriched: 07/08/2026, 12:15:11 UTC
Last updated: 08/13/2026, 12:41:08 UTC
Views: 38
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