CVE-2025-12909

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-11-08 · updated 2026-10-07
Weakness: CWE-693

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 products

Google Chrome: before 140.0.7339.80 — fixed in 140.0.7339.80

How to fix

Upgrade to a fixed version: Google Chrome 140.0.7339.80. Check the vendor advisory for mitigations.

References

https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html
https://issues.chromium.org/issues/361116749

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