CVE-2025-12908Public exploitNetwork attack vector

Domain spoofing via malformed data URL host parsing

Published Nov 7, 2025 · Updated Nov 7, 2025

Improper input validation in Google Chrome for Android before 140.0.7339.80 allows remote attackers to spoof download origins via crafted HTML. The Android downloads UI derives an eTLD+1 from a malformed data URL without first ensuring that the URL has a valid host, causing attacker-controlled text to appear as the download origin. The attack requires user interaction with a download from the crafted page, and the reported consequence is misleading origin display rather than code execution or data modification.

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

Improper input validation in Google Chrome for Android before 140.0.7339.80 allows remote attackers to spoof download origins via crafted HTML. The Android downloads UI derives an eTLD+1 from a malformed data URL without first ensuring that the URL has a valid host, causing attacker-controlled text to appear as the download origin. The attack requires user interaction with a download from the crafted page, and the reported consequence is misleading origin display rather than code execution or data modification.

The record

CVE
CVE-2025-12908
Published
Nov 7, 2025
Updated
Nov 7, 2025
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-20, T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2025Record 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=140.0.7339.80 <140.0.7339.80

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=140.0.7339.80 <140.0.7339.80

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

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-20Improper Input Validation
T1036Masquerading

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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