PT-2026-49717 · Forem · Forem

Published 2026-06-16 · Updated 2026-06-16 · CVE-2026-48780

NVD

CVSS v3.1

8.2

High

Base vector

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

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.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2026-48780

Affected Products

Forem

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-48780 · Security Note
• https://github.com/forem/forem/commit/a2ab6d409d2676eb0711ecbd737192043125b437 · Note
• https://github.com/forem/forem/security/advisories/GHSA-3g4h-9h37-mpx6 · Note