CVE-2026-18809 — MEDIUM (6.5)

Vulnerability Description

Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-200

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2055683
https://www.mozilla.org/security/advisories/mfsa2026-73/

FAQ

What is CVE-2026-18809?

CVE-2026-18809 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.

How severe is CVE-2026-18809?

CVE-2026-18809 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18809?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.