CVE-2026-8811 Path traversal in PDF generation module
Attackers can exploit improper filename handling to write files outside intended directories, potentially achieving code execution or modifying data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8811?
CVE-2026-8811 is a high-severity path traversal vulnerability in SEPPmail AG Secure Email Gateway, published on 18 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SEPPmail versions before 15.0.5 allow improper handling of attachment filenames during encrypted PDF generation. An attacker can exploit this to create new files outside the intended directory, potentially placing files in web-accessible locations.
Weakness: CWE-22
Which versions are affected by CVE-2026-8811?
How do I fix CVE-2026-8811?
No fix has been published for CVE-2026-8811 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-8811 being exploited?
There is no known exploitation of CVE-2026-8811 in the wild and no public exploit code.
Sources
Also known as GHSA-hp2p-h743-jhv4.