UpHeron
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Servers and applications

CVE-2026-33427

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.

Severity
Low 2.7
Published
21 Mar 2026
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
2026.1.2, 2026.2.1
Sources
NVD

Affected software

SoftwareAffected versions
DiscourseServers and applications · cpe:a:discourse:discourse
  • From 2026.1.0 before 2026.1.2
  • From 2026.2.0 before 2026.2.1
  • Version 2026.3.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-33427
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33427