CVE-2026-32113
Discourse: Open redirect via `sso_destination_url` cookie in `enter`
Description
Discourse is an open-source discussion platform. From versions 2026.1.0 to before 2026.1.3, and 2026.2.0 to before 2026.2.2, 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.
How to fix CVE-2026-32113
To remediate CVE-2026-32113, upgrade the affected package to a fixed version below.
- —upgrade to 2026.1.3 or later
Is CVE-2026-32113 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 2026.1.0, < 2026.1.3, >= 2026.2.0, < 2026.2.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
References (5)
- WEBgithub.com/discourse/discourse/commit/080408b93d00305b51d71f63f755f43fa601884d
- WEBgithub.com/discourse/discourse/security/advisories/GHSA-378j-ccw4-4fwh
- WEBmeta.discourse.org/t/use-discourse-as-an-identity-provider-sso-discourseconnect/32974
- WEBmeta.discourse.org/t/using-discourse-as-a-sso-provider/32974