CVE-2026-18809 Information disclosure in Firefox for Android and Firefox Focus for Android
An attacker can exploit an information disclosure flaw in Firefox for Android and Firefox Focus for Android to access sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18809?
CVE-2026-18809 is a medium-severity vulnerability in Mozilla Firefox, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.
Weakness: CWE-200
Which versions are affected by CVE-2026-18809?
How do I fix CVE-2026-18809?
No fix has been published for CVE-2026-18809 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18809 being exploited?
There is no known exploitation of CVE-2026-18809 in the wild and no public exploit code.
Sources
Also known as GHSA-v5x7-vhwf-5v44, UBUNTU-CVE-2026-18809.