CVE-2026-8521

HIGHNVD 7.57.5—

7.5

Use after free in Tab Groups in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)

CVSS v3: 7.5
EG Score: 7.5(high)
EPSS: 13.7%
KEV: Not listed

Published

May 14, 2026

Last Modified

May 18, 2026

Advisory Details (2)

Auto-updated May 18, 2026

No patch confirmed yet.

generic

Chromium

https://issues.chromium.org/issues/504106200

generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html

Vendor Advisories for CVE-2026-8521(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-8521
Microsoft Security Response Center (MSRC)
Chromium: CVE-2026-8521 Use after free in Tab Groups

Frequently asked(5)

What is CVE-2026-8521?

CVE-2026-8521 is a high vulnerability published on May 14, 2026. Use after free in Tab Groups in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)

When was CVE-2026-8521 disclosed?

CVE-2026-8521 was first published in the National Vulnerability Database on May 14, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-8521 actively exploited?

CVE-2026-8521 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-8521?

CVE-2026-8521 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2026-8521?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8521, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-8521

Explore →

Is Your Infrastructure Affected by CVE-2026-8521?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2026-8521

📅 Published

🔄 Last Modified

📋 Advisory Details (2)