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Microsoft Edge Chromium Based CVE-2026-57989

| EUVDEUVD-2026-49058 HIGH
Origin Validation Error (CWE-346)
2026-07-26 microsoft GHSA-cwgc-vfm7-rq3r
7.4
CVSS 3.1 · Vendor: microsoft
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Origin validation
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 26, 2026

Information disclosure in Microsoft Edge (Chromium-based) stems from an origin validation error, allowing a network-based attacker to read sensitive data. The vulnerability requires user interaction (e.g., visiting a malicious website) to trigger a cross-origin leak, potentially exposing data across different security contexts. A patch is available via Microsoft's update guide; no active exploitation or public exploit has been reported at this time.

Affected VersionsENISA

Microsoft Edge (Chromium-based) 1.0.0.0 <150.0.4078.99

Affected Packages

euvd microsoft_edge_chromium_based fix: 150.0.4078.99

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (microsoft) PRIMARY 7.4 HIGH
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

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

Threat Intelligence Overview

EPSS Score
0.4%
Top 64% exploitable
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Unlikely
Social Media
3
Sightings
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +37
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

CVE-2026-58289 HIGH POC
8.3 Jul 03

Remote code execution in Microsoft Edge (Chromium-based) before 150.0.4078.48 allows an unauthenticated attacker to run

CVE-2026-57983 CRITICAL
10.0 Jul 03

Security-feature bypass in Microsoft Edge (Chromium-based) versions prior to 150.0.4078.48 lets a remote, unauthenticate

CVE-2026-45495 CRITICAL
9.8 May 18

Remote code execution in Microsoft Edge (Chromium-based) lets an attacker run arbitrary code in the browser by getting a

CVE-2026-66321 CRITICAL
9.6 Aug 03

Remote code execution in Microsoft Edge (Chromium-based) before 151.0.4129.59 allows a network attacker to run arbitrary

CVE-2026-66312 HIGH
8.8 Aug 03

Remote code execution via buffer over-read in Microsoft Edge (Chromium-based) versions prior to 151.0.4129.59 affects au

CVE-2026-66326 HIGH
8.8 Aug 03

Remote code execution in Microsoft Edge (Chromium-based) prior to version 151.0.4129.59 is achievable by an unauthentica

CVE-2026-70341 HIGH
8.8 Sep 11

Use-after-free memory corruption in Microsoft Edge (Chromium-based) can let remote attackers execute arbitrary code in t

CVE-2026-57981 HIGH
8.8 Jul 03

Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free memory corruption flaw (CWE-416) th

CVE-2026-57974 HIGH
8.8 Jul 03

Remote code execution in Microsoft Edge (Chromium-based) allows an unauthenticated attacker to run arbitrary code by lur

CVE-2026-56645 HIGH
8.8 Jul 03

Remote code execution in Microsoft Edge (Chromium-based) stems from a heap-based buffer overflow (CWE-122) that a networ

CVE-2026-72984 HIGH
8.8 Aug 28

Remote code execution in Microsoft Edge (Chromium-based) is enabled by a type confusion vulnerability (CWE-843) that can

CVE-2026-57985 HIGH
8.8 Jul 03

Remote code execution in Microsoft Edge (Chromium-based) before version 150.0.4078.48 allows an unauthenticated remote a

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