CVE-2025-12909 Information disclosure in Chrome
Medium 5.3
Published
Updated
Check this codebase for CVE-2025-12909 and fix it if it is affected.
What it is: CVE-2025-12909 is a medium-severity vulnerability in Google Chrome, published on 7 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-12909 in the wild and no public exploit code.
Affected product: Google Chrome. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2025-12909/ (Markdown: https://insights.sbomify.com/CVE-2025-12909/index.md)
Remote attackers can leak cross-origin data via Devtools due to insufficient policy enforcement in Google Chrome.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-12909?
CVE-2025-12909 is a medium-severity vulnerability in Google Chrome, published on 7 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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)
Weakness: CWE-693
Which versions are affected by CVE-2025-12909?
It affects 1 product.
Products include Google Chrome.
How do I fix CVE-2025-12909?
Upgrade to a fixed version.
Is CVE-2025-12909 being exploited?
There is no known exploitation of CVE-2025-12909 in the wild and no public exploit code.
Other vulnerabilities in Google Chrome
Sources
Also known as DEBIAN-CVE-2025-12909, GHSA-cvvh-gp7g-9334.