PT-2026-51379 · Gophish · Gophish

Ashik Mohamed · Published 2026-06-22 · Updated 2026-06-22 · CVE-2026-39904

Mitre

CVSS v3.1

6.5

Medium

Base vector

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

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.

Exploit

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-39904

Affected Products

Gophish

References · 3

• 🔥 https://github.com/ashikmd7/GoPhish-0.12.1/blob/main/Unbounded%20Memory%20Allocation%20in%20Office%20Attachment%20Processing%20Leads%20to%20Server%20DoS/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-39904 · Security Note
• https://vulncheck.com/advisories/gophish-denial-of-service-via-office-document-upload · Note