Google Patches 5th Chrome Zero-Day Exploited in 2026
Google released an update for Chrome 149 that patches 74 vulnerabilities, including a critical zero-day tracked as CVE-2026-11645. This vulnerability is a high-severity out-of-bounds read/write flaw in the V8 JavaScript engine, which allows remote code execution within the sandbox via a specially crafted HTML page. The zero-day was actively exploited in the wild and reported by an anonymous researcher in late April 2026. This is the fifth Chrome zero-day exploited in 2026, highlighting an ongoing trend of critical vulnerabilities in the browser. Google has awarded the researcher $55,000 for responsible disclosure. The patch fixes this and other critical vulnerabilities, mitigating the risk posed by these exploits.
AI Analysis
Technical Summary
CVE-2026-11645 is a high-severity out-of-bounds read/write vulnerability in the V8 engine of Google Chrome, enabling remote attackers to execute arbitrary code inside the sandbox through crafted HTML content. It was actively exploited in the wild before being patched in Chrome 149, which addresses 74 vulnerabilities in total. The flaw was responsibly disclosed by an anonymous researcher who previously reported other Chrome bugs. This zero-day is the fifth exploited in Chrome during 2026, indicating a surge in critical vulnerabilities, possibly driven by AI-assisted discovery. Google has released an official fix in Chrome 149 to address this issue.
Potential Impact
The vulnerability allows remote code execution within the Chrome sandbox, which could enable attackers to run arbitrary code on affected systems. Although no detailed attack information is available, exploitation likely involves chaining this flaw with a sandbox escape vulnerability to compromise the host. The active exploitation of this zero-day prior to patching represents a significant risk to users running vulnerable Chrome versions. The patch in Chrome 149 mitigates this risk by fixing the underlying out-of-bounds read/write issue in V8.
Mitigation Recommendations
Google has released an official fix for this vulnerability in Chrome version 149. Users and organizations should update to Chrome 149 or later immediately to mitigate the risk posed by CVE-2026-11645. No additional mitigation steps are indicated beyond applying the official update.
Google Patches 5th Chrome Zero-Day Exploited in 2026
Description
Google released an update for Chrome 149 that patches 74 vulnerabilities, including a critical zero-day tracked as CVE-2026-11645. This vulnerability is a high-severity out-of-bounds read/write flaw in the V8 JavaScript engine, which allows remote code execution within the sandbox via a specially crafted HTML page. The zero-day was actively exploited in the wild and reported by an anonymous researcher in late April 2026. This is the fifth Chrome zero-day exploited in 2026, highlighting an ongoing trend of critical vulnerabilities in the browser. Google has awarded the researcher $55,000 for responsible disclosure. The patch fixes this and other critical vulnerabilities, mitigating the risk posed by these exploits.
Reddit Discussion
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-11645 is a high-severity out-of-bounds read/write vulnerability in the V8 engine of Google Chrome, enabling remote attackers to execute arbitrary code inside the sandbox through crafted HTML content. It was actively exploited in the wild before being patched in Chrome 149, which addresses 74 vulnerabilities in total. The flaw was responsibly disclosed by an anonymous researcher who previously reported other Chrome bugs. This zero-day is the fifth exploited in Chrome during 2026, indicating a surge in critical vulnerabilities, possibly driven by AI-assisted discovery. Google has released an official fix in Chrome 149 to address this issue.
Potential Impact
The vulnerability allows remote code execution within the Chrome sandbox, which could enable attackers to run arbitrary code on affected systems. Although no detailed attack information is available, exploitation likely involves chaining this flaw with a sandbox escape vulnerability to compromise the host. The active exploitation of this zero-day prior to patching represents a significant risk to users running vulnerable Chrome versions. The patch in Chrome 149 mitigates this risk by fixing the underlying out-of-bounds read/write issue in V8.
Mitigation Recommendations
Google has released an official fix for this vulnerability in Chrome version 149. Users and organizations should update to Chrome 149 or later immediately to mitigate the risk posed by CVE-2026-11645. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Source Type
- Subreddit
- cybersecurity
- Reddit Score
- 0
- Discussion Level
- minimal
- Content Source
- reddit_link_post
- Post Type
- link
- Domain
- null
- Newsworthiness Assessment
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- Has External Source
- true
- Trusted Domain
- false
Threat ID: 6a27b3b4e29bf47b50574676
Added to database: 6/9/2026, 6:33:24 AM
Last enriched: 6/9/2026, 6:33:32 AM
Last updated: 6/9/2026, 7:58:16 AM
Views: 6
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