PT-2026-26360 · Discourse · Discourse

Nlgbao1340 · Publicado 2026-03-19 · Atualizado 2026-03-27 · CVE-2026-27570

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Média

Vetor base

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.3.0-latest.1 Discourse versions prior to 2026.2.1 Discourse versions prior to 2026.1.2

Description 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. This could allow for potential issues related to the display of conversation titles.

Recommendations Update Discourse to version 2026.3.0-latest.1 or later. Update Discourse to version 2026.2.1 or later. Update Discourse to version 2026.1.2 or later. As a workaround, tighten access by changing the ai bot public sharing allowed groups site setting.

Exploit

Correção

XSS

Enumeração de Fraquezas

CWE-79

Identificadores relacionados

BIT-DISCOURSE-2026-27570

CVE-2026-27570

GHSA-HFXW-89HW-VWMV

Produtos afetados

Discourse

Referências · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27570.json · Exploit
• https://github.com/discourse/discourse/commit/43a5a60b595f0120e6adfc131f2408508fe341f1 · Correção
• https://github.com/discourse/discourse/commit/f2aafa5c7467c94fcd4ebd36785a98e77ca088cc · Correção
• https://github.com/discourse/discourse/commit/c14f8f52b7999328bd9f8665f2ecfa24dadc4bf1 · Correção
• https://github.com/discourse/discourse/security/advisories/GHSA-hfxw-89hw-vwmv · Aviso do Fabricante
• https://twitter.com/CVEnew/status/2035627056558391407 · Publicação no Twitter
• https://twitter.com/infoflowcloud/status/2035627920090099754 · Publicação no Twitter
• https://osv.dev/vulnerability/BIT-discourse-2026-27570 · Aviso do Fabricante
• https://osv.dev/vulnerability/CVE-2026-27570 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2026-27570 · Nota de Segurança