{"id":"CVE-2026-21356","kind":"vulnerability","aliases":["CVE-2026-21356"],"related":[],"title":"CVE-2026-21356 rejected by CNA as issued in error","description":"Rejected reason: this CVE was issued in error.","summary":"This CVE identifier was rejected and withdrawn because it was issued in error. No vulnerable product or flaw is described in the sources.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other"],"not_affected_if":[],"how_to_check":null,"fix":"No action is indicated: the CVE was rejected as issued in error, so no patch or upgrade is needed for this identifier.","status":"withdrawn","published_at":"2026-10-20T19:17:35+00:00","first_seen_at":"2026-10-23T21:57:21+00:00","triaged_at":"2026-10-25T05:04:41+00:00","updated_at":"2026-10-25T05:04:41+00:00","category":"other","confidence":0.9,"triage":{"at":"2026-10-25T05:04:41Z","model":"claude-haiku-5-5","output":{"fix":"No action is indicated: the CVE was rejected as issued in error, so no patch or upgrade is needed for this identifier.","reach":"unknown","title":"CVE-2026-21356 rejected by CNA as issued in error","impact":"low","summary":"This CVE identifier was rejected and withdrawn because it was issued in error. No vulnerable product or flaw is described in the sources.","category":"other","nicknames":[],"who_cares":[],"confidence":0.9,"needs_auth":"unknown","worst_case":"unknown","analyst_note":"","how_to_check":"unknown","needs_analyst":false,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000459,"input_tokens":3209,"output_tokens":276,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':2A,12A,15A '-21356':3A,13A,16A 'cna':6A 'cve':1A,11A,14A,18B,43C 'describ':36B 'error':10A,29B,47C 'flaw':34B 'identifi':19B 'issu':8A,27B,45C 'product':32B 'reason':41C 'reject':4A,21B,40C 'sourc':39B 'vulner':31B 'withdrawn':23B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T19:17:35+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-21356","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21356","severity":null,"published_at":"2026-10-20T19:17:35+00:00","modified_at":"2026-10-20T19:17:35+00:00","first_seen_at":"2026-10-23T21:57:21+00:00","fetched_at":"2026-10-23T22:28:58+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"}