CVE-2026-45494Network attack vector

Content spoofing via undisclosed script injection

Published May 18, 2026 · Updated May 18, 2026

Cross-site scripting in Microsoft Edge (Chromium-based) before 148.0.3967.70 allows remote attackers to spoof displayed browser content. Microsoft has not disclosed the affected navigation or rendering locus or the operation that incorporates attacker-controlled input into generated content. Exploitation requires user interaction and permits browser-content misrepresentation and limited disclosure or modification of browser-context data.

CVSS severity5.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Microsoft Edge (Chromium-based) before 148.0.3967.70 allows remote attackers to spoof displayed browser content. Microsoft has not disclosed the affected navigation or rendering locus or the operation that incorporates attacker-controlled input into generated content. Exploitation requires user interaction and permits browser-content misrepresentation and limited disclosure or modification of browser-context data.

The record

CVE
CVE-2026-45494
Published
May 18, 2026
Updated
May 18, 2026
Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2026CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.0 <148.0.3967.70

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Edge (Chromium-based)version=1.0.0.0 <148.0.3967.70

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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