UpHeron
All vulnerabilities

Servers and applications

CVE-2026-27570

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the onebox method in the SharedAiConversation model renders the conversation title directly into HTML without proper sanitization. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, tighten access by changing the `ai_bot_public_sharing_allowed_groups`…

Severity
Medium 5.1
Published
19 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-2026-27570
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-27570