Medium severity · published Mar 31, 2026
CVE-2026-32113
Discourse: Open redirect via `sso_destination_url` cookie in `enter`
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
discourse · discourse
>= 2026.1.0-latest, < 2026.1.3; >= 2026.2.0-latest, < 2026.2.2; >= 2026.3.0-latest, < 2026.3.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32113
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-32113
Patch
https://github.com/discourse/discourse/commit/080408b93d00305b51d71f63f755f43fa601884d
Mitigation
https://github.com/discourse/discourse/security/advisories/GHSA-378j-ccw4-4fwh
Product
https://meta.discourse.org/t/using-discourse-as-a-sso-provider/32974
Product
https://meta.discourse.org/t/use-discourse-as-an-identity-provider-sso-discourseconnect/32974
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