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CVE-2023-49096 is an argument injection vulnerability in Jellyfin, specifically in the VideosController and potentially the AudioController. The endpoints /Videos/<itemId>/stream and /Videos/<itemId>/stream.<container> accept user-supplied parameters such as videoCodec and audioCodec, which are ultimately passed as arguments to FFmpeg. Due to insufficient sanitization, an attacker can inject additional arguments into the FFmpeg command line. While UseShellExecute is set to false, preventing command chaining or execution of arbitrary commands, the attacker can still manipulate FFmpeg's behavior, potentially leading to arbitrary file overwrite or other abuses. The endpoints are accessible without authentication, but exploitation requires knowledge of a random GUID itemId, making practical exploitation unlikely without an information leak.
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Cross-references every affected SKU, including bundled OEM variants.
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