{"id":"CVE-2026-119843","kind":"vulnerability","aliases":["CVE-2026-119843"],"related":[],"title":"GStreamer gst-plugins-good: malformed FLV file crashes media-playing applications","description":"A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.","summary":"The FLV demuxer in GStreamer's gst-plugins-good does not validate buffer sizes when parsing enhanced audio and video tags in malformed or truncated FLV files. A remote attacker can supply a crafted FLV file that causes an assertion failure or process crash, denying service to the application playing it.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["flv","gstreamer","media-processing","package"],"not_affected_if":["no-flv-input","no-gstreamer"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-03T10:17:16+00:00","first_seen_at":"2026-11-03T10:20:15+00:00","triaged_at":"2026-11-03T10:20:39+00:00","updated_at":"2026-11-03T10:20:39+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-11-03T10:20:39Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"GStreamer gst-plugins-good: malformed FLV file crashes media-playing applications","impact":"low","summary":"The FLV demuxer in GStreamer's gst-plugins-good does not validate buffer sizes when parsing enhanced audio and video tags in malformed or truncated FLV files. A remote attacker can supply a crafted FLV file that causes an assertion failure or process crash, denying service to the application playing it.","audience":"businesses","category":"package","nicknames":[],"who_cares":["gstreamer","media-processing","flv"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Application crashes; denial of service only, no code execution stated.","analyst_note":"Check the NVD entry and the GStreamer advisory for affected and fixed versions of gst-plugins-good.","how_to_check":"- unknown","plain_action":"","needs_analyst":true,"not_affected_if":["no-flv-input","no-gstreamer"],"who_is_affected":"Applications built on GStreamer that open or stream FLV media, such as media players or services that process uploaded video, are exposed to a crash on a crafted file. unknown whether default configurations of common distributions include the affected demuxer path.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000656,"input_tokens":4158,"output_tokens":481,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119843':16A,19A '-2026':15A,18A 'applic':13A,75B,140C 'assert':66B,143C 'attack':56B,117C 'audio':44B,105C 'avail':101C 'base':139C 'buffer':39B,97C 'caus':64B 'could':118C 'craft':60B,126C 'crash':9A,70B,148C 'cve':14A,17A 'data':100C 'demux':28B,92C 'deni':71B 'denial':151C 'enhanc':43B,104C 'exploit':119C 'failur':67B,144C 'file':8A,53B,62B,129C 'flaw':78C 'flv':7A,20B,27B,52B,61B,90C,113C,127C 'found':80C 'good':5A,35B,87C 'gst':3A,33B,85C 'gst-plugins-good':2A,32B,84C 'gstreamer':1A,21B,30B,82C,138C 'gstreamer-bas':137C 'lead':149C 'malform':6A,49B,110C 'media':11A,23B,91C,128C 'media-play':10A 'media-process':22B 'open':132C 'packag':25B,88C 'pars':42B 'play':12A,76B 'plugin':4A,34B,86C 'process':24B,69B,103C,147C 'proper':95C 'provid':123C 'remot':55B,116C 'servic':72B,153C 'size':40B,98C 'special':125C 'stream':114C,134C 'suppli':58B 'tag':47B,108C 'trigger':141C 'truncat':51B,112C 'valid':38B,96C 'video':46B,107C 'vulner':121C","nicknames":[],"mitigations":[],"who_affected":"Applications built on GStreamer that open or stream FLV media, such as media players or services that process uploaded video, are exposed to a crash on a crafted file. unknown whether default configurations of common distributions include the affected demuxer path.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["flv","gstreamer","mediaprocessing","medium","package"],"first_public_at":"2026-11-03T10:17:16+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119843","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119843","severity":null,"published_at":"2026-11-03T10:17:16+00:00","modified_at":"2026-11-03T10:17:16+00:00","first_seen_at":"2026-11-03T10:20:15+00:00","fetched_at":"2026-11-03T10:20:15+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}