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CVE-2026-33427

Published: Mar 20, 2026

Modified: Mar 23, 2026

PUBLISHED

Description

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.

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`

Weaknesses (CWE)

References

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

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