{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-77386", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-20T19:36:13.806Z", "datePublished": "2026-09-18T17:16:37.282Z", "dateUpdated": "2026-09-18T17:16:37.282Z"}, "containers": {"cna": {"title": "Kyoo: OIDC login token can be redirected to an attacker-controlled URL", "problemTypes": [{"descriptions": [{"cweId": "CWE-601", "lang": "en", "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/zoriya/Kyoo/security/advisories/GHSA-xhg6-v78p-xf44", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/zoriya/Kyoo/security/advisories/GHSA-xhg6-v78p-xf44"}, {"name": "https://github.com/zoriya/Kyoo/pull/1576", "tags": ["x_refsource_MISC"], "url": "https://github.com/zoriya/Kyoo/pull/1576"}, {"name": "https://github.com/zoriya/Kyoo/commit/02ab3af8127a081295fd7bed103847173c0d7632", "tags": ["x_refsource_MISC"], "url": "https://github.com/zoriya/Kyoo/commit/02ab3af8127a081295fd7bed103847173c0d7632"}, {"name": "https://github.com/zoriya/Kyoo/releases/tag/v5.1.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/zoriya/Kyoo/releases/tag/v5.1.0"}], "affected": [{"vendor": "zoriya", "product": "Kyoo", "versions": [{"version": "< 5.1.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T17:16:37.282Z"}, "descriptions": [{"lang": "en", "value": "Kyoo is a self-hosted media server focused on movies, series, and anime. Prior to 5.1.0, an unauthenticated attacker could initiate the OIDC login flow with an attacker-controlled redirectUrl. The login handling in auth/oidc.go stored that URL with the opaque login state, and /auth/oidc/logged/{provider} appended the provider, token, and error values before redirecting the victim's browser without validating the destination. Because the one-use token was not bound to the browser session that initiated login, an attacker who induced a victim to complete OIDC authentication could capture the token at the attacker-controlled destination and exchange it through /auth/oidc/callback/{provider} for the victim's Kyoo session. This issue is fixed in version 5.1.0."}], "source": {"advisory": "GHSA-xhg6-v78p-xf44", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "Kyoo", "vendor": "zoriya", "versions": [{"status": "affected", "version": "< 5.1.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Kyoo is a self-hosted media server focused on movies, series, and anime. Prior to 5.1.0, an unauthenticated attacker could initiate the OIDC login flow with an attacker-controlled redirectUrl. The login handling in auth/oidc.go stored that URL with the opaque login state, and /auth/oidc/logged/{provider} appended the provider, token, and error values before redirecting the victim's browser without validating the destination. Because the one-use token was not bound to the browser session that initiated login, an attacker who induced a victim to complete OIDC authentication could capture the token at the attacker-controlled destination and exchange it through /auth/oidc/callback/{provider} for the victim's Kyoo session. This issue is fixed in version 5.1.0."}], "id": "CVE-2026-77386", "lastModified": "2026-09-18T18:17:14.513", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-18T18:17:14.513", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/zoriya/Kyoo/commit/02ab3af8127a081295fd7bed103847173c0d7632"}, {"source": "security-advisories@github.com", "url": "https://github.com/zoriya/Kyoo/pull/1576"}, {"source": "security-advisories@github.com", "url": "https://github.com/zoriya/Kyoo/releases/tag/v5.1.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/zoriya/Kyoo/security/advisories/GHSA-xhg6-v78p-xf44"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-09-19T12:00:08.779903+00:00", "updated": "2026-09-19T12:00:08.779908+00:00", "vendors": []}