{"id":"CVE-2019-16278","kind":"vulnerability","aliases":["CVE-2019-16278"],"related":[],"title":"nazgul nostromo nhttpd: Directory Traversal in the function http_verify in nostromo nhttpd through 1.9.6 allows an attacker to achieve…","description":"Nostromo nhttpd contains a directory traversal vulnerability in the http_verify() function in a non-chrooted nhttpd server allowing for remote code execution.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Nostromo nhttpd is a small web server, and a directory traversal flaw in its http_verify() function lets remote requests reach files outside the web root. The description says this allows remote code execution on a non-chrooted server, and CISA lists it as actively exploited.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2024-11-07T00:00:00+00:00","products":[{"name":"Nostromo nhttpd","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"nazgul nostromo nhttpd","fixed":["1.9.7"],"affected":"< 1.9.7","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","nostromo","other","self-hosted","web-server"],"not_affected_if":["chrooted-deployment","other-web-server"],"how_to_check":"Identify whether the nhttpd binary is running (for example ps aux | grep nhttpd) and whether it runs without chroot.","fix":"Apply the vendor mitigation or stop using Nostromo nhttpd; the sources do not name a fixed version.","status":"open","published_at":"2019-10-14T17:15:09+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:56:19+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-23T20:56:19Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation or stop using Nostromo nhttpd; the sources do not name a fixed version.\nunknown","reach":"internet","impact":"high","summary":"Nostromo nhttpd is a small web server, and a directory traversal flaw in its http_verify() function lets remote requests reach files outside the web root. The description says this allows remote code execution on a non-chrooted server, and CISA lists it as actively exploited.","category":"other","who_cares":["nostromo","self-hosted","web-server"],"confidence":0.6,"needs_auth":"no","worst_case":"Remote attacker runs code on server through traversal","analyst_note":"Find the vendor advisory and the fixed or affected version range; the sources list the product with affected and fixed fields unknown.","how_to_check":"Identify whether the nhttpd binary is running (for example ps aux | grep nhttpd) and whether it runs without chroot.\nunknown","needs_analyst":true,"not_affected_if":["chrooted-deployment","other-web-server"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"critical"},"cost_usd":0.000478,"input_tokens":2819,"output_tokens":393,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-16278':23A,26A '-2019':22A,25A '1.9.6':15A 'achiev':20A 'action':114C 'activ':86B 'allow':16A,71B,107C 'appli':115C 'attack':18A 'chroot':79B,104C 'cisa':82B,112C 'code':73B,110C 'contain':90C 'cve':21A,24A 'descript':68B 'directori':4A,50B,92C 'discontinu':121C 'execut':74B,111C 'exploit':32B,87B 'file':62B 'flaw':52B 'function':8A,57B,99C 'host':37B 'http':9A,55B,97C 'instruct':119C 'let':58B 'list':83B 'mitig':116C,127C 'nazgul':1A,29A 'nhttpd':3A,13A,28A,31A,42B,89C,105C 'non':78B,103C 'non-chroot':77B,102C 'nostromo':2A,12A,27A,30A,33B,41B,88C 'outsid':63B 'per':117C 'product':125C 'reach':61B 'remot':59B,72B,109C 'request':60B 'requir':113C 'root':66B 'say':69B 'self':36B 'self-host':35B 'server':40B,47B,80B,106C 'small':45B 'travers':5A,51B,93C 'unavail':129C 'use':122C 'vendor':118C 'verifi':10A,56B,98C 'vulner':94C 'web':39B,46B,65B 'web-serv':38B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-10-14T17:15:09+00:00","kev":{"dateAdded":"2024-11-07","dueDate":"2024-11-28","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-16278","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-16278","severity":null,"published_at":"2024-11-07T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T10:39:05+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-16278","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-16278","severity":null,"published_at":"2019-10-14T17:15:09+00:00","modified_at":"2026-06-17T02:22:03+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}