{"id":"CVE-2026-72756","kind":"vulnerability","aliases":["CVE-2026-72756"],"related":[],"title":"Routinator: crafted RRDP rsync URI makes the RPKI validator exit","description":"Routinator exits when an rsync URI for a file obtained over RRDP contains a path that cannot be stored on disk, such as too long file names, and folder names that overlap with existing file names.","summary":"Routinator, an RPKI validator, exits when an rsync URI obtained over RRDP contains a path that cannot be stored on disk, such as overly long file names or folder names that clash with existing file names. An attacker who controls a publication point can stop the validator from running.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","routinator","rpki","self-hosted"],"not_affected_if":["no-routinator"],"how_to_check":"- Check the installed Routinator version with `routinator --version` and compare it against the fixed release in the advisory.\n- Confirm whether the instance fetches repositories over RRDP with `routinator --version` and the configuration file; the sources do not give a config key.","fix":"- Upgrade Routinator to the fixed release listed in the NVD entry (version unknown from the sources).\n- Until patched, monitor the validator process for unexpected exits; the sources do not name a workaround.","status":"open","published_at":"2026-10-26T18:18:42+00:00","first_seen_at":"2026-10-26T18:31:44+00:00","triaged_at":"2026-10-26T18:33:45+00:00","updated_at":"2026-10-26T18:33:45+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-10-26T18:33:45Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Routinator to the fixed release listed in the NVD entry (version unknown from the sources).\n- Until patched, monitor the validator process for unexpected exits; the sources do not name a workaround.","reach":"network","title":"Routinator: crafted RRDP rsync URI makes the RPKI validator exit","impact":"low","summary":"Routinator, an RPKI validator, exits when an rsync URI obtained over RRDP contains a path that cannot be stored on disk, such as overly long file names or folder names that clash with existing file names. An attacker who controls a publication point can stop the validator from running.","category":"package","nicknames":[],"who_cares":["routinator","rpki","self-hosted"],"confidence":0.5,"needs_auth":"unknown","worst_case":"validator process crashes and stops producing validated data","analyst_note":"Sources give only the NVD record; find the fixed Routinator version and any vendor advisory for the exact affected range and check for a workaround.","how_to_check":"- Check the installed Routinator version with `routinator --version` and compare it against the fixed release in the advisory.\n- Confirm whether the instance fetches repositories over RRDP with `routinator --version` and the configuration file; the sources do not give a config key.","needs_analyst":true,"not_affected_if":["no-routinator"],"who_is_affected":"Operators who run Routinator to validate RPKI data pulled from RRDP publication points. Exposure depends on the validator fetching from untrusted or third-party repositories; teams that do not run Routinator can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000614,"input_tokens":3280,"output_tokens":572,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-72756':13A,16A 'attack':60B 'cannot':39B,88C 'clash':54B 'contain':35B,84C 'control':62B 'craft':2A 'cve':11A,14A 'disk':43B,92C 'exist':56B,105C 'exit':10A,27B,73C 'file':48B,57B,80C,97C,106C 'folder':51B,100C 'host':22B 'long':47B,96C 'make':6A 'name':49B,52B,58B,98C,101C,107C 'obtain':32B,81C 'over':46B 'overlap':103C 'packag':17B 'path':37B,86C 'point':65B 'public':64B 'routin':1A,18B,23B,72C 'rpki':8A,19B,25B 'rrdp':3A,34B,83C 'rsync':4A,30B,76C 'run':71B 'self':21B 'self-host':20B 'stop':67B 'store':41B,90C 'uri':5A,31B,77C 'valid':9A,26B,69B","nicknames":[],"mitigations":[],"who_affected":"Operators who run Routinator to validate RPKI data pulled from RRDP publication points. Exposure depends on the validator fetching from untrusted or third-party repositories; teams that do not run Routinator can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T18:18:42+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_by":"sep@nlnetlabs.nl","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-72756","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72756","severity":null,"published_at":"2026-10-26T18:18:42+00:00","modified_at":"2026-10-26T18:18:42+00:00","first_seen_at":"2026-10-26T18:31:44+00:00","fetched_at":"2026-10-26T18:31:44+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"}