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CVE-2025-13634VulnerabilityPublished

CVE-2025-13634: Google Chrome · Inappropriate Implementation

Affects Google ChromeSource CVE Database V5

0

Not known to be exploited · CVSS 4.4 Medium : upgrade to 143.0.7499.41 when convenient.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 3.1 base score
4.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 143.0.7499.41
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade google/chrome to 143.0.7499.41.

Affected software

ProductAffectedFixed in
Googlegoogle/chromepkg:deb/google/chromeOther threatsAffected
  • <143.0.7499.41
Fixed in
  • 143.0.7499.41

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

European organizations should implement the following specific mitigation measures: 1) Immediately update Google Chrome on all Windows endpoints to version 143.0.7499.41 or later once available to ensure the vulnerability is patched. 2) Enforce strict endpoint security policies that limit local user privileges and restrict the ability to run or open untrusted HTML content or downloads. 3) Deploy application whitelisting and endpoint detection and response (EDR) solutions to monitor and block suspicious file executions that bypass MOTW protections. 4) Educate users about the risks of interacting with unknown or suspicious HTML pages, emphasizing caution with downloads and local content. 5) Utilize network-level protections such as web filtering to block access to potentially malicious sites hosting crafted HTML content. 6) Regularly audit and monitor local user activity and download behaviors to detect anomalies indicative of exploitation attempts. 7) Coordinate with IT teams to ensure timely deployment of Chrome updates and verify patch status across all endpoints. These measures go beyond generic advice by focusing on local user access controls, user awareness, and proactive monitoring tailored to the specific nature of this vulnerability.

Description

Inappropriate implementation in Downloads in Google Chrome on Windows prior to 143.0.7499.41 allowed a local attacker to bypass mark of the web via a crafted HTML page. (Chromium security severity: Medium)

References

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