CVE-2026-66316
published 2026-08-04CVE-2026-66316: Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
PriorityP428medium5.4CVSS 3.1
AVNACLPRNUIRSUCLILAN
EPSS
0.21%
10.9th percentile
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | edge_chromium | < 151.0.4129.59 | 151.0.4129.59 |
| microsoft | microsoft_edge | >= 1.0.0.0 < 151.0.4129.59 | 151.0.4129.59 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Microsoft Edge up to 150.0.4078.99 improper authorization
vuldb·2026-08-04·CVSS 5.4
CVE-2026-66316 [MEDIUM] Microsoft Edge up to 150.0.4078.99 improper authorization
A vulnerability categorized as critical has been discovered in Microsoft Edge. The impacted element is an unknown function. The manipulation results in improper authorization.
This vulnerability is reported as CVE-2026-66316. The attack can be launched remotely. No exploit exists.
It is advisable to upgrade the affected component.
GHSA
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
ghsa_unreviewed·2026-08-04
CVE-2026-66316 [MEDIUM] CWE-346 Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-04
Published