Description
Use after free in FedCM in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
Published: 2026-08-25
Score: 9.6 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

This vulnerability is a use‑after‑free flaw in the Federated Credential Management (FedCM) API of Google Chrome. A crafted HTML page may trigger a memory corruption that allows a remote attacker to execute arbitrary code outside the browser sandbox. The flaw is rated high in Chromium’s internal severity, indicating that a successful exploitation could compromise system confidentiality and integrity.

Affected Systems

Google Chrome versions released before 152.0.7977.65 contain the affected FedCM implementation. Users of the stable channel of Chrome prior to that build are impacted.

Risk and Exploitability

The EPSS score is not available, and the vulnerability is not listed in CISA’s KEV catalog. The CVSS score of 9.6 indicates a critical severity, which aligns with the high internal severity assessment. The likely attack vector is a social‑engineering attack that delivers a malicious web page to a user. An attacker who succeeds in exploiting the use‑after‑free can bypass the browser sandbox and run code with the privileges of the browser process.

Generated by OpenCVE AI on August 26, 2026 at 02:44 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install Chrome update 152.0.7977.65 or later to remove the vulnerable FedCM implementation.
  • If an update cannot be applied immediately, disable the FedCM feature through Chrome policies or by blocking load of federated credential pages on untrusted sites.
  • Continue to rely on Chrome’s sandbox and Safe Browsing features as a secondary defense until the patch is installed.

Generated by OpenCVE AI on August 26, 2026 at 02:44 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4771-1 chromium security update
Debian DSA Debian DSA DSA-6482-1 chromium security update
History

Wed, 26 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

Wed, 26 Aug 2026 04:15:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Wed, 26 Aug 2026 03:00:00 +0000

Type Values Removed Values Added
Title FedCM Use‑After‑Free Enables Remote Code Execution in Chrome

Wed, 26 Aug 2026 01:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 25 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Description Use after free in FedCM in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-416
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-08-27T03:55:50.236Z

Reserved: 2026-08-25T06:08:44.306Z

Link: CVE-2026-79078

cve-icon Vulnrichment

Updated: 2026-08-26T00:19:11.694Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-25T21:18:03.623

Modified: 2026-08-27T04:17:22.187

Link: CVE-2026-79078

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T04:00:04Z

Weaknesses