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CVE-2023-6038

High (7.5)—Exploit
Patch with priorityPublic exploit code is available (Nuclei template (automated mass detection)). No confirmed active exploitation.
Severity7.5High · CVSS 3.1
Exploitation probability4.34 %higher than 91% of CVEs · score from Nov 5, 2026
Active exploitationNonot in the CISA catalog · checked Nov 6, 03:00 AM
Public exploitAvailableNuclei template (automated mass detection)

A Local File Inclusion (LFI) vulnerability exists in the h2o-3 REST API, allowing unauthenticated remote attackers to read arbitrary files on the server with the permissions of the user running the h2o-3 instance. This issue affects the default installation and does not require user interaction. The vulnerability can be exploited by making specific GET or POST requests to the ImportFiles and ParseSetup endpoints, respectively. This issue was identified in version 3.40.0.4 of h2o-3.

Timeline

Built from our own data: NVD, CISA KEV, FIRST EPSS, public exploits, specialised media and Orbitaley coverage.

  1. CVE record published in NVD
  2. Record last modified in NVD
  3. First public exploit

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (1)

H2O — H2O

NVD record

NVD status
Modified
Published
Nov 16, 2023
Last modified
Jun 17, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE)
CWE-862

References

Raw JSON (NVD)

Show
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