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Jellyfin — CWE-312 Disclosure Brief (jellyfin-0002)
2026-04-13 · Patch available — awaiting upstream merge
Finding
Three CWE-312 (cleartext storage of sensitive information) defects in Jellyfin. Access tokens, Schedules Direct authentication tokens, and QuickConnect secrets are logged verbatim in application logs.
The Defects
jellyfin-0002-a (PATCHED — HIGH): Emby.Server.Implementations/Session/SessionManager.cs:1717
_logger.LogInformation("Logging out access token {0}", device.AccessToken);
Logs the full access token on logout. Access tokens grant authenticated API access.
jellyfin-0002-b (PATCHED — MEDIUM): src/Jellyfin.LiveTv/Listings/SchedulesDirect.cs:645
_logger.LogInformation("Authenticated with Schedules Direct token: {Token}", root.Token);
Logs the Schedules Direct API authentication token.
jellyfin-0002-c (PATCHED — LOW): Emby.Server.Implementations/QuickConnect/QuickConnectManager.cs:219
_logger.LogDebug("Removing expired secret {Secret}", secret);
_logger.LogWarning("Secret {Secret} already expired", secret);
Logs QuickConnect secrets during expiration cleanup.
Impact
Jellyfin is a widely deployed media server. These logs flow to systemd journal, log files, and any connected log aggregation service. Access tokens in logs enable session hijacking. Schedules Direct tokens enable unauthorized API access to paid listing services.
The Fix
Replace token/secret logging with safe identifiers:
// Before
_logger.LogInformation("Logging out access token {0}", device.AccessToken);
// After
_logger.LogInformation("Logging out access token for device {DeviceId}", device.DeviceId);
// Before
_logger.LogInformation("Authenticated with Schedules Direct token: {Token}", root.Token);
// After
_logger.LogInformation("Authenticated with Schedules Direct successfully");
Patch
Fix available: defects/jellyfin-0002/patch/jellyfin-0002.patch
Three-file patch across SessionManager.cs, SchedulesDirect.cs, and QuickConnectManager.cs. Removes all cleartext credential logging.
What We Ask
A patch is ready for review.
- Confirm receipt and assign a GitHub issue reference (jellyfin/jellyfin).
- Assess severity — access tokens logged on every session logout.
- Coordinate a disclosure date — we are targeting 90 days from first contact.
- We will credit the Jellyfin team in the public disclosure. Preferred acknowledgment format welcome.
Contact: see cover email. This brief is confidential until coordinated disclosure.