Path Traversal in M66b Fairemail
CVE-2026-68509
FairEmail is a fully featured, open source, privacy-friendly email app for Android. Prior to 1.2325, shared attachment handling does not adequately sanitize an attacker-controlled filename before constructing its destination path. A local attacker-controlled app can therefore supply path components that escape the intended shared attachment directory and overwrite or corrupt files in the FairEmail private data directory, including account or message databases. Exploitation requires app lock using PIN or biometric authentication and user interaction to unlock FairEmail. This issue is fixed in version 1.2325.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- M66b Fairemail — versions < 1.2325
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-68509?
- CVE-2026-68509 is a medium-severity vulnerability in M66b Fairemail, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-11-05.
- How severe is CVE-2026-68509?
- Medium severity. CVSS v3 base score is 6.3 out of 10.