CVE-2026-66318PATCHED

Microsoft · Microsoft Edge (Chromium-based)

Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

Description

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

Affected Products

Vendor	Product	Versions
Microsoft	Microsoft Edge (Chromium-based)	1.0.0.0

Also Affects

Downstream vendors/products affected by this vulnerability

Vendor	Product	Source	Confidence
microsoft	edge	cert_advisory	90%

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66318(vendor-advisory, patch)

Related News (2 articles)

Tier B

BSI Advisories4d ago

[NEU] [hoch] Microsoft Edge: Mehrere Schwachstellen

→ No new info (linked only)

Tier C

VulDB5d ago

CVE-2026-66318 | Microsoft Edge up to 150.0.4078.99 improper authorization

→ No new info (linked only)

CVSS 3.18.1 HIGH

VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

CISA KEV❌ No

Actively exploited❌ No

Patch available

151.0.4129.59

CWECWE-346

PublishedAug 3, 2026

Last enriched5d ago

Trending Score25

Source articles2

Independent2

Info Completeness7/14

Missing: title, description, epss, kev, exploit, iocs, mitre_attack

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Verification

State: verified

Confidence: 0%

Vulnerability Timeline

CVE Published

Aug 3, 2026

Discovered by ZDM

Aug 3, 2026

Patch Available

Aug 5, 2026