Vulnerability · Published Nov 7, 2025 · Assigned by Chrome
CVE-2025-12909
Medium 5.3
In plain English
A medium-severity security flaw in Chrome from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 89.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Insufficient policy enforcement in Devtools in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to leak cross-origin data via Devtools. (Chromium security severity: Low)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 140.0.7339.80-1~deb12u1 | DEBIAN-CVE-2025-12909 |
| Debian:12 | chromium | 140.0.7339.80-1~deb12u1 | DSA-5993-1 |
| Debian:13 | chromium | 140.0.7339.80-1~deb13u1 | DEBIAN-CVE-2025-12909 |
| Debian:13 | chromium | 140.0.7339.80-1~deb13u1 | DSA-5993-1 |
| Debian:14 | chromium | 140.0.7339.80-1 | DEBIAN-CVE-2025-12909 |
Affected products (as reported)
Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N