Cross-site data disclosure via site-isolation bypass
Published May 6, 2026 · Updated May 6, 2026
Site-isolation bypass in Google Chrome before 148.0.7778.96 allows remote attackers with a compromised renderer to read cross-site data. The ServiceWorker implementation mishandles crafted HTML, but Google has not disclosed the specific code path or incorrect operation. Exploitation requires user interaction with the crafted page and prior renderer compromise; the reported consequence is limited confidentiality loss across site boundaries.
Summary
What happened
Site-isolation bypass in Google Chrome before 148.0.7778.96 allows remote attackers with a compromised renderer to read cross-site data. The ServiceWorker implementation mishandles crafted HTML, but Google has not disclosed the specific code path or incorrect operation. Exploitation requires user interaction with the crafted page and prior renderer compromise; the reported consequence is limited confidentiality loss across site boundaries.
The record
- CVE
- CVE-2026-7909
- Published
- May 6, 2026
- Updated
- May 6, 2026
- Vendor
- Go standard library
- Product
- Google Chrome
- Classifications
- CWE-693
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 6, 2026CVE publishedPublication date reported by the CVE source.
- May 6, 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=148.0.7778.96 <148.0.7778.96
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.
Weakness, pattern, technique
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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