CVE-2025-9865

Chromium: CVE-2025-9865 Inappropriate implementation in Toolbar

CVE-2025-9865 is fixed in 3 products on 2 platforms, first by DEBIAN-CVE-2025-9865, released September 3, 2025. It is not reported as exploited. Patch Radar priority: Routine.

RoutineFixed on 2 platforms

CVSS

5.4

medium

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0027

19th percentile

<p>This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see <a href="https://chromereleases.googleblog.com/202%5BSS9.1%5D5">Google Chrome Releases</a> for more information.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
Google Chrome (EXE)	144.0.7559.133	Google Chrome (EXE) 144.0.7559.133	Feb 3, 2026
Google Chrome Dev (EXE)	144.0.7534.3	Google Chrome Dev (EXE) 144.0.7534.3	Nov 20, 2025
Linux
chromium · Debian 12.15 (bookworm)	140.0.7339.80-1~deb12u1	DEBIAN-CVE-2025-9865	Sep 3, 2025
chromium · Debian 13.5 (trixie)	140.0.7339.80-1~deb13u1	DEBIAN-CVE-2025-9865	Sep 3, 2025
chromium · Debian 14	140.0.7339.80-1	DEBIAN-CVE-2025-9865	Sep 3, 2025

Details

Published
September 3, 2025
Weakness
CWE-451: User Interface (UI) Misrepresentation of Critical Information
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-9865

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