Vulnerability in Microsoft Edge Chromium
CVE-2026-58291
Operation on a resource after expiration or release in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
EPSS: 0.006 (45.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N.
Affected products
- Microsoft Edge_chromium
- Microsoft Edge (Chromium-based) — versions 1.0.0.0
Weakness classification (CWE)
References
- Microsoft Edge (Chromium-based) Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-58291?
- CVE-2026-58291 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Operation on a Resource after Expiration or Release. CVSS score: 6.1/10. Published 2026-07-03.
- How severe is CVE-2026-58291?
- Medium severity. CVSS v3 base score is 6.1 out of 10.