CVE-2026-0903Network attack vector

Dangerous-file protection bypass via insufficient validation

Published Jan 20, 2026 · Updated Jan 20, 2026

Input validation failure in Google Chrome Downloads before 144.0.7559.59 on Windows allows remote attackers to bypass dangerous-file protections. The Downloads component inadequately validates a malicious file before applying dangerous-file handling; Google has not disclosed the specific validation error. Exploitation requires user interaction with attacker-supplied content and permits the file to evade the browser's intended protection.

CVSS severity5.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Input validation failure in Google Chrome Downloads before 144.0.7559.59 on Windows allows remote attackers to bypass dangerous-file protections. The Downloads component inadequately validates a malicious file before applying dangerous-file handling; Google has not disclosed the specific validation error. Exploitation requires user interaction with attacker-supplied content and permits the file to evade the browser's intended protection.

The record

CVE
CVE-2026-0903
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-20, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 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=144.0.7559.59 <144.0.7559.59

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=144.0.7559.59 <144.0.7559.59

Published CVSS scores

5.4CISA-ADPCVSS: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-20Insufficient Validation of Input
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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