Use after free in FedCM in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to execute arbitrary code outside the sandbox via a… (CVE-2026-103630)
A use-after-free vulnerability exists in the FedCM component of Google Chrome versions prior to 154.0.8037.97. This flaw allows a remote attacker to execute arbitrary code outside the browser sandbox by crafting a malicious HTML page. The vulnerability has been assigned CVE-2026-103630 and is considered high severity by Chromium security. No CVSS score is provided. No explicit patch or remediation details are available in the provided data.
AI Analysis
Technical Summary
CVE-2026-103630 is a use-after-free vulnerability in the FedCM component of Google Chrome before version 154.0.8037.97. Exploitation requires a remote attacker to deliver a specially crafted HTML page, which can lead to arbitrary code execution outside the sandbox environment. This vulnerability is classified under CWE-416 (Use After Free). The vulnerability was publicly disclosed on October 2, 2026. No known exploits in the wild have been reported, and no patch or vendor advisory details are included in the provided information.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code outside the sandbox, potentially compromising the security boundary of the browser and the underlying system. This could lead to full system compromise depending on the attacker's payload and system configuration.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor official Google Chrome security advisories for updates and apply any available patches promptly once released.
Use after free in FedCM in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to execute arbitrary code outside the sandbox via a… (CVE-2026-103630)
Description
A use-after-free vulnerability exists in the FedCM component of Google Chrome versions prior to 154.0.8037.97. This flaw allows a remote attacker to execute arbitrary code outside the browser sandbox by crafting a malicious HTML page. The vulnerability has been assigned CVE-2026-103630 and is considered high severity by Chromium security. No CVSS score is provided. No explicit patch or remediation details are available in the provided data.
Affected software
pkg:github/chromium/chromiumRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103630 is a use-after-free vulnerability in the FedCM component of Google Chrome before version 154.0.8037.97. Exploitation requires a remote attacker to deliver a specially crafted HTML page, which can lead to arbitrary code execution outside the sandbox environment. This vulnerability is classified under CWE-416 (Use After Free). The vulnerability was publicly disclosed on October 2, 2026. No known exploits in the wild have been reported, and no patch or vendor advisory details are included in the provided information.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code outside the sandbox, potentially compromising the security boundary of the browser and the underlying system. This could lead to full system compromise depending on the attacker's payload and system configuration.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor official Google Chrome security advisories for updates and apply any available patches promptly once released.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-m4rg-hrvv-hwc6
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-103630"]
- State
- PUBLISHED
Threat ID: 6ac00d25a43b0b3b89fb1480
Added to database: 10/02/2026, 19:59:33 UTC
Last enriched: 10/02/2026, 20:03:06 UTC
Last updated: 10/03/2026, 04:45:56 UTC
Views: 7
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.