CVE-2026-39904: Gophish

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Gophish through 0.12.1 contains a denial of service vulnerability that allows authenticated users with the User role to exhaust server memory by uploading a crafted Office document as an email template attachment. The ApplyTemplate() function in models/attachment.go processes Office documents as ZIP archives and calls ioutil.ReadAll() on each contained file entry without enforcing size restrictions on uncompressed content, allowing a zip bomb payload to expand to several gigabytes in memory and cause the process to be terminated by the operating system.

Affected products

• Gophish Gophish: up to and including 0.12.1

Published 2026-06-22. Last modified 2026-10-08.