CVE-2026-27570

Published: Mar 19, 2026 Last Modified: Mar 19, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,1
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

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` site setting.

79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Confidentiality Integrity Availability
Potential Impacts:
Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies: AI/ML, Web Based, Web Server
Likelihood of Exploit: High
View CWE Details
https://github.com/discourse/discourse/commit/43a5a60b595f0…
https://github.com/discourse/discourse/commit/43a5a60b595f0120e6adfc131f2408508…
https://github.com/discourse/discourse/commit/c14f8f52b7999…
https://github.com/discourse/discourse/commit/c14f8f52b7999328bd9f8665f2ecfa24d…
https://github.com/discourse/discourse/commit/f2aafa5c7467c…
https://github.com/discourse/discourse/commit/f2aafa5c7467c94fcd4ebd36785a98e77…
https://github.com/discourse/discourse/security/advisories/…
https://github.com/discourse/discourse/security/advisories/GHSA-hfxw-89hw-vwmv