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ExploitedIn CISA KEVFix available

CVE-2019-16278

Exploitation confirmed. First attested on 2023-10-14 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2019-10-14
  • Fixed in1.9.7
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Directory Traversal in the function http_verify in nostromo nhttpd through 1.9.6 allows an attacker to achieve remote code execution via a crafted HTTP request.

Timeline

dates in UTC
  1. 2019-10-1417:15CVE publishedNVD
  2. 2019-11-01Exploit-DB entryExploit-DB
  3. 2023-10-1414:56Listed as exploited by GCVEGCVE
  4. 2023-10-1414:56Exploitation first reportedGCVE
  5. 2024-11-07Added to the CISA KEV catalogCISA KEV
  6. 2025-08-2003:56SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-16278?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-16278?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP
Nazgul nostromo nhttpd
BranchAffectedFixed in
1.9< 1.9.71.9.7
1.9≤ 1.9.6no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Nazgul nostromo nhttpd to 1.9.7
  2. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2024-11-28

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-47573EDB-47837
Exploit-DB
Proof-of-concept repositories
15 repositories, unverifiedjas502n/CVE-2019-16278imjdl/CVE-2019-16278-PoCianxtianxt/CVE-2019-16278darkerego/Nostromo_Python3AnubisSec/CVE-2019-16278
PoC-in-GitHub
Metasploit modules
1 moduleexploit/multi/http/nostromo_code_execrank: goodModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2024-11-07
Patch Due Date
2024-11-28
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-10-14
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-495x-r3cr-6rgx

Frequently asked questions

What is CVE-2019-16278?

Directory Traversal in the function http_verify in nostromo nhttpd through 1.9.6 allows an attacker to achieve remote code execution via a crafted HTTP request.

Is CVE-2019-16278 actively exploited?

Yes. CVE-2019-16278 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2024-11-28.

What is the CVSS score for CVE-2019-16278?

CVE-2019-16278 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record