What is CVE-2026-57991?

CVE-2026-57991 is a high-severity vulnerability in Microsoft Edge (Chromium-based), classified under Improper Link Resolution Before File Access. CVSS score: 7.4/10. Published 2026-07-03.

How severe is CVE-2026-57991?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Microsoft Edge (Chromium-based)

CVE-2026-57991

Improper link resolution before file access ('link following') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Microsoft Edge (Chromium-based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-57991?: CVE-2026-57991 is a high-severity vulnerability in Microsoft Edge (Chromium-based), classified under Improper Link Resolution Before File Access. CVSS score: 7.4/10. Published 2026-07-03.
How severe is CVE-2026-57991?: High severity. CVSS v3 base score is 7.4 out of 10.