CVE-2026-32113

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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."}, {"lang": "es", "value": "Discourse es una plataforma de discusi\u00f3n de c\u00f3digo abierto. Desde las versiones 2026.1.0-latest hasta antes de la 2026.1.3, 2026.2.0-latest hasta antes de la 2026.2.2, y 2026.3.0-latest hasta antes de la 2026.3.0, la acci\u00f3n 'enter' en StaticController lee la cookie sso_destination_url y redirige a ella con allow_other_host: true sin validar la URL de destino. Si bien esta cookie se establece normalmente durante flujos leg\u00edtimos de DiscourseConnect Provider con cargas \u00fatiles SSO validadas criptogr\u00e1ficamente, las cookies son controladas por el cliente y pueden ser establecidas por atacantes. Este problema ha sido parcheado en las versiones 2026.1.3, 2026.2.2 y 2026.3.0."}], "id": "CVE-2026-32113", "lastModified": "2026-07-24T20:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32113", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-01T13:56:09.785795Z", "version": "2.0.3"}}]}, "published": "2026-03-31T18:16:49.363", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/discourse/discourse/commit/080408b93d00305b51d71f63f755f43fa601884d"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/discourse/discourse/security/advisories/GHSA-378j-ccw4-4fwh"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://meta.discourse.org/t/using-discourse-as-a-sso-provider/32974"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Product"], "url": "https://meta.discourse.org/t/use-discourse-as-an-identity-provider-sso-discourseconnect/32974"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.1.0-latest,2026.1.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.2.0-latest,2026.2.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.3.0-latest,2026.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "discourse", "source": "cna", "vendor": "discourse"}, "product": "discourse", "vendor": "discourse"}], "analysis": {"en": {"generated_at": "2026-04-03T15:22:08.554259+00:00", "value": {"mitigation_remediation": ["Apply the latest Discourse patch or upgrade to version 2026.1.3, 2026.2.2, or 2026.3.0 or newer", "If an immediate upgrade is not possible, remove or block the sso_destination_url cookie for unauthenticated users", "Monitor incoming requests for unexpected sso_destination_url cookie values and block or log suspicious traffic"], "summary": {"action": "Patch Immediately", "impact": "Open Redirect"}, "threat_synthesis": {"affected_systems": "Discourse versions from 2026.1.0 up to but excluding 2026.1.3, from 2026.2.0 up to but excluding 2026.2.2, and from 2026.3.0 versions before 2026.3.0 are affected. The issue is fixed in 2026.1.3, 2026.2.2, and 2026.3.0.", "description_and_impact": "The vulnerability is an open redirect flaw in Discourse\u2019s StaticController. The enter action reads an sso_destination_url cookie and redirects to that URL without validating it. Because the cookie can be set by an attacker, the application can send users to arbitrary external sites, enabling phishing or other social\u2011engineering attacks. The weakness corresponds to CWE\u2011601, an unvalidated redirect or forward.", "risk_and_exploitability": "The CVSS score of 5.1 indicates moderate severity, and the EPSS score of less than 1\u202f% suggests the likelihood of exploitation is low. The vulnerability is not listed in the CISA KEV catalog. The attack vector is client\u2011side: an attacker can set the sso_destination_url cookie with a malicious URL and then direct a user to the vulnerable entry point. Upon visiting the link, the user is redirected to the attacker\u2019s chosen site. Because no server\u2011side authentication or validation is performed, the redirect is guaranteed if the cookie is present."}}}}, "created": "2026-03-31T19:53:45.091967+00:00", "updated": "2026-04-03T21:17:29.637407+00:00", "vendors": ["discourse", "discourse$PRODUCT$discourse"]}