CVE-2026-45150Public exploitNetwork attack vector

Credential theft via hidden fullscreen origin indicators

Published Jul 15, 2026 · Updated Jul 15, 2026

Origin spoofing in Zen Browser before 1.19.13b allows remote attackers to impersonate trusted sites through a malicious webpage. Fullscreen mode hides the address bar and origin indicators without maintaining a conspicuous, non-spoofable notice, allowing page content to imitate browser or website interfaces. Exploitation requires a user to open and interact with attacker-controlled content; credentials entered into the imitation interface become exposed.

CVSS severity6.3
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin spoofing in Zen Browser before 1.19.13b allows remote attackers to impersonate trusted sites through a malicious webpage. Fullscreen mode hides the address bar and origin indicators without maintaining a conspicuous, non-spoofable notice, allowing page content to imitate browser or website interfaces. Exploitation requires a user to open and interact with attacker-controlled content; credentials entered into the imitation interface become exposed.

The record

CVE
CVE-2026-45150
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Zen Browser
Product
Zen Browser
Classifications
CWE-451, T1056.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=< 1.19.13b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zen Browser · Zen Browserversion=< 1.19.13b

Published CVSS scores

6.3GitHub_MCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-451User Interface (UI) Misrepresentation of Critical Information
T1056.003Input Capture: Web Portal Capture

Public exploit references

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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