{"id":"CVE-2026-48780","summary":"Forem vulnerable to bypass of email address domain restrictions","details":"Forem is open source software for building communities. Prior to commit a2ab6d4, a maliciously crafted email address could allow an attacker to bypass domain allowlist or denylist restrictions and gain access to invite-only forem deployments. The issue is patched as of `a2ab6d4`. As a workaround, some SMTP servers and email delivery providers may drop or refuse to send maliciously crafted email addresses.","aliases":["GHSA-3g4h-9h37-mpx6"],"modified":"2026-07-08T08:13:51.518659711Z","published":"2026-06-16T14:10:27.047Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48780.json","unresolved_ranges":[{"extracted_events":[{"fixed":"a2ab6d4"}],"source":"AFFECTED_FIELD"}],"cwe_ids":["CWE-287"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48780.json"},{"type":"ADVISORY","url":"https://github.com/forem/forem/security/advisories/GHSA-3g4h-9h37-mpx6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48780"},{"type":"FIX","url":"https://github.com/forem/forem/commit/a2ab6d409d2676eb0711ecbd737192043125b437"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/forem/forem","events":[{"introduced":"0"},{"fixed":"a2ab6d409d2676eb0711ecbd737192043125b437"}],"database_specific":{"source":"REFERENCES"}}],"versions":["stable.20210804.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48780.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}