Cross-origin data disclosure via Background Fetch
Published May 27, 2025 · Updated May 28, 2025
Information disclosure in Google Chrome before 137.0.7151.55 allows remote attackers to leak cross-origin data via a crafted HTML page. Google identifies the locus as the Background Fetch API but has not disclosed the implementation error that breaks cross-origin isolation. Exploitation requires a user to load attacker-controlled HTML; the reported consequence is cross-origin data disclosure, not code execution or service interruption.
Summary
What happened
Information disclosure in Google Chrome before 137.0.7151.55 allows remote attackers to leak cross-origin data via a crafted HTML page. Google identifies the locus as the Background Fetch API but has not disclosed the implementation error that breaks cross-origin isolation. Exploitation requires a user to load attacker-controlled HTML; the reported consequence is cross-origin data disclosure, not code execution or service interruption.
The record
- CVE
- CVE-2025-5064
- Published
- May 27, 2025
- Updated
- May 28, 2025
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-200
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 27, 2025CVE publishedPublication date reported by the CVE source.
- May 28, 2025Record 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=137.0.7151.55 <137.0.7151.55
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
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Technologies
Your stack
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Your stack
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