Cross-site data disclosure via site isolation bypass
Published Jun 24, 2026 · Updated Jun 24, 2026
Origin validation error in Google Chrome before 149.0.7827.197 allows remote attackers to bypass site isolation via crafted HTML. Google identifies the Passwords component but has not published the faulty validation or operation that lets a compromised renderer cross the site boundary. Exploitation requires prior renderer compromise and user interaction with crafted content; the published impact is limited to cross-site data disclosure.
Summary
What happened
Origin validation error in Google Chrome before 149.0.7827.197 allows remote attackers to bypass site isolation via crafted HTML. Google identifies the Passwords component but has not published the faulty validation or operation that lets a compromised renderer cross the site boundary. Exploitation requires prior renderer compromise and user interaction with crafted content; the published impact is limited to cross-site data disclosure.
The record
- CVE
- CVE-2026-13034
- Published
- Jun 24, 2026
- Updated
- Jun 24, 2026
- Vendor
- Go standard library
- Product
- Google Chrome
- Classifications
- CWE-346, T1185
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 24, 2026CVE publishedPublication date reported by the CVE source.
- Jun 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=149.0.7827.197 <149.0.7827.197
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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