Memory corruption via Dawn out-of-bounds write
Published May 28, 2026 · Updated May 28, 2026
Out-of-bounds write in Dawn in Google Chrome on Mac before 148.0.7778.216 allows remote attackers to corrupt memory via crafted HTML. Google identifies Dawn as the affected component but has not published the specific buffer, write path, or input that exceeds its bounds. Exploitation requires a Mac user to open attacker-controlled HTML; the published assessment identifies limited integrity impact, not a demonstrated sandbox escape.
Summary
What happened
Out-of-bounds write in Dawn in Google Chrome on Mac before 148.0.7778.216 allows remote attackers to corrupt memory via crafted HTML. Google identifies Dawn as the affected component but has not published the specific buffer, write path, or input that exceeds its bounds. Exploitation requires a Mac user to open attacker-controlled HTML; the published assessment identifies limited integrity impact, not a demonstrated sandbox escape.
The record
- CVE
- CVE-2026-9930
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Vendor
- WebM Project
- Product
- Chrome
- Classifications
- CWE-787
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- May 28, 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?
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- Affected version<148.0.7778.216
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.
Activity data is delayed. The latest report is Sep 28, 2026.
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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