CVE-2026-32113
MEDIUMDiscourse: Open redirect via `sso_destination_url` cookie in `enter`
Title source: cnaDescription
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the enter action in StaticController reads the sso_destination_url cookie and redirects to it with allow_other_host: true without validating the destination URL. While this cookie is normally set during legitimate DiscourseConnect Provider flows with cryptographically validated SSO payloads, cookies are client-controlled and can be set by attackers. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-378j-ccw4-4fwh
X_Refsource_Misc x_refsource_misc
https://github.com/discourse/discourse/commit/080408b93d00305b51d71f63f755f43fa601884d
X_Refsource_Misc x_refsource_misc
https://meta.discourse.org/t/using-discourse-as-a-sso-provider/32974
Scores
CVSS v3
6.1
EPSS
0.0019
EPSS Percentile
9.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-601
Status
published
Products (5)
discourse/discourse
2026.3.0 (2 CPE variants)
discourse/discourse
2026.1.0 - 2026.1.3
discourse/discourse
>= 2026.1.0-latest, < 2026.1.3
discourse/discourse
>= 2026.2.0-latest, < 2026.2.2
discourse/discourse
>= 2026.3.0-latest, < 2026.3.0
Published
Mar 31, 2026
Tracked Since
Mar 31, 2026