CVE-2026-33427 — Discourse Authorization Page Displays Unvalidated Redirect Domain

CVE-2026-33427

Discourse Authorization Page Displays Unvalidated Redirect Domain PUBLISHED

Description (CNA)

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an unauthenticated attacker can cause a legitimate Discourse authorization page to display an attacker-controlled domain, facilitating social engineering attacks against users. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected >= 2026.1.0-latest, < 2026.1.2; affected >= 2026.2.0-latest, < 2026.2.1; affected = 2026.3.0-latest

CWE

CWE-862

References

https://github.com/discourse/discourse/security/advisories/GHSA-9vhg-2mx3-mqfr

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.