{"id":"GHSA-42jc-v69j-g38f","summary":"Gophish contains a denial of service vulnerability","details":"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.","aliases":["CVE-2026-39904","GO-2026-6212"],"modified":"2026-08-18T15:11:18.041324346Z","published":"2026-06-22T21:31:00Z","database_specific":{"github_reviewed_at":"2026-08-06T19:16:24Z","nvd_published_at":"2026-06-22T21:16:23Z","cwe_ids":["CWE-770"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39904"},{"type":"WEB","url":"https://github.com/ashikmd7/GoPhish-0.12.1/blob/main/Unbounded%20Memory%20Allocation%20in%20Office%20Attachment%20Processing%20Leads%20to%20Server%20DoS/README.md"},{"type":"PACKAGE","url":"https://github.com/gophish/gophish"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/gophish-denial-of-service-via-office-document-upload"}],"affected":[{"package":{"name":"github.com/gophish/gophish","ecosystem":"Go","purl":"pkg:golang/github.com/gophish/gophish"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.12.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-42jc-v69j-g38f/GHSA-42jc-v69j-g38f.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}