CVE-2026-27793

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{"affected": [{"affectedData": [{"product": "seerr", "vendor": "seerr-team", "versions": [{"status": "affected", "version": "< 3.1.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:seerr:seerr:*:*:*:*:*:*:*:*", "matchCriteriaId": "7BB6479F-6D32-46FD-8EB0-27A92F2C38C9", "versionEndExcluding": "3.1.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.1.0, the `GET /api/v1/user/:id` endpoint returns the full settings object for any user, including Pushover, Pushbullet, and Telegram credentials, to any authenticated requester regardless of their privilege level. This vulnerability can be exploited alone or combined with the reported unauthenticated account creation vulnerability, CVE-2026-27707. When combined, the two vulnerabilities create a zero-prior-access chain that leaks third-party API credentials for all users, including administrators. Version 3.1.0 contains a fix for both this vulnerability and for CVE-2026-27707."}, {"lang": "es", "value": "Seerr es un gestor de solicitudes y descubrimiento de medios de c\u00f3digo abierto para Jellyfin, Plex y Emby. Antes de la versi\u00f3n 3.1.0, el endpoint 'GET /api/v1/user/:id' devuelve el objeto de configuraci\u00f3n completo para cualquier usuario, incluyendo credenciales de Pushover, Pushbullet y Telegram, a cualquier solicitante autenticado independientemente de su nivel de privilegio. Esta vulnerabilidad puede ser explotada sola o combinada con la vulnerabilidad de creaci\u00f3n de cuentas no autenticadas reportada, CVE-2026-27707. Cuando se combinan, las dos vulnerabilidades crean una cadena de acceso previo cero que filtra credenciales de API de terceros para todos los usuarios, incluyendo administradores. La versi\u00f3n 3.1.0 contiene una soluci\u00f3n para esta vulnerabilidad y para CVE-2026-27707."}], "id": "CVE-2026-27793", "lastModified": "2026-06-17T10:27:41.540", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27793", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-02T12:50:56.548791Z", "version": "2.0.3"}}]}, "published": "2026-02-27T20:21:39.587", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/seerr-team/seerr/commit/4f089b29d0bb41d382168b17aa152eb5b8a25303"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/seerr-team/seerr/releases/tag/v3.1.0"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/seerr-team/seerr/security/advisories/GHSA-f7xw-jcqr-57hp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.1.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "seerr", "source": "cna", "vendor": "seerr-team"}, "product": "seerr", "vendor": "seerr-team"}], "analysis": {"en": {"generated_at": "2026-04-16T15:20:40.296003+00:00", "value": {"mitigation_remediation": ["Upgrade Seerr to version\u202f3.1.0 or later; the release contains the fix for this and the related account\u2011creation issue.", "If an immediate upgrade is not feasible, restrict the GET /api/v1/user/:id endpoint so that only privileged accounts can invoke it, or filter out Pushover, Pushbullet, and Telegram fields from the response.", "Disable or secure the unauthenticated account\u2011creation feature until its fix is applied."], "summary": {"action": "Patch Now", "impact": "Confidentiality Breach (Credentials Exposure)"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the open\u2011source media request manager Seerr, version 3.0.x and earlier. Users running 3.0.x or prior are exposed until they upgrade to the fixed 3.1.0 release. Seerr integrates with media servers such as Jellyfin, Plex, and Emby, but the flaw resides in Seerr itself.", "description_and_impact": "Seerr's GET /api/v1/user/:id endpoint returns a full settings object for any authenticated requester, including Pushover, Pushbullet, and Telegram credentials. This lack of object\u2011level authorization allows an attacker with any authenticated session to retrieve third\u2011party API keys that belong to other users, potentially enabling them to send messages on behalf of those users or compromise connected services. The flaw is an authorization bypass (CWE\u2011639). The impact is a confidentiality breach that exposes sensitive credentials. When combined with the unrelated unauthenticated account\u2011creation flaw (CVE\u20112026\u201127707), the two become a zero\u2011privilege chain that can exfiltrate all user credentials, even those of administrators.", "risk_and_exploitability": "The reported CVSS score is 6.5, indicating moderate severity, and the EPSS score is less than 1\u202f%, meaning the exploitation probability is currently low. The flaw requires only an authenticated session, and attackers do not need elevated privileges to trigger it, so the risk is moderate to high for organizations that allow many users to log in. The vulnerability is not listed in the CISA KEV catalog, so it is not known to be actively exploited in the wild."}}}}, "created": "2026-03-02T12:05:08.167895+00:00", "updated": "2026-04-16T15:30:06.216430+00:00", "vendors": ["seerr-team", "seerr-team$PRODUCT$seerr"]}