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TI-2026-39491 Aliases CVE-2026-54665GHSA-8vm2-c32j-mvfr

Apache NiFi: Missing Validation for Proxy Host Headers

Priority LOW 28CWE-346Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-346.

Summary

Apache NiFi 0.0.1 through 2.9.0 support building qualified URLs from one of several HTTP request headers that provide an alternative to the standard Host header without validating the values provided. Apache NiFi 1.6.0 introduced a configurable application property to restrict values provided in the HTTP Host header, but did not apply the validation to alternative Proxy and Forwarded headers. The absence of proxy host header validation allowed a client to instruct Apache NiFi web services to construct invalid qualified URLs for redirection or data references. Upgrading to Apache NiFi 2.10.0 is the recommended mitigation, which implements validation for the X-ProxyHost and X-Forwarded-Host HTTP request headers based on the nifi.web.proxy.host property. Enabling header validation requires configuring the application with HTTPS. Reverse proxy servers in front of Apache NiFi are responsible for filtering input request headers and providing allowed values to the application.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00327 25th percentileScored 2026-11-07
Fix Fixed Apache NiFi (Apache Software Foundation): 2.10.0org.apache.nifi:nifi-jetty (Maven): 2.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache NiFi0.0.1 to before 2.10.02.10.0Patch availableCNA
—org.apache.nifi:nifi-jetty (Maven)before 2.10.02.10.0Patch availableGHSA-8vm2-c32j-mvfr
  • Apache NiFi VendorApache Affected 0.0.1 to before 2.10.0 Fixed in 2.10.0 Patch available CNA
  • org.apache.nifi:nifi-jetty (Maven) Vendor— Affected before 2.10.0 Fixed in 2.10.0 Patch available GHSA-8vm2-c32j-mvfr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*0.0.1 to before 2.10.0VulnerableApache
  • cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:* Versions 0.0.1 to before 2.10.0 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache NiFi (Apache Software Foundation) Fixed in 2.10.0
  • Fix · GHSA-8vm2-c32j-mvfr org.apache.nifi:nifi-jetty (Maven) Fixed in 2.10.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54665
  2. 2026-10-03 Alias added: GHSA-8vm2-c32j-mvfr

References

Advisory 3

Other 2

  • TI-2023-17293 Apache NiFi: Potential Code Injection with Database Services using H2 CVSS 3.1HIGH 8.8
  • TI-2020-16549 Uncontrolled resource consumption in Eclipse Jetty CVSS 3.1MEDIUM 5.3
  • TI-2019-07411 Deserialization of untrusted data in Apache Commons Beanutils CVSS 3.1HIGH 7.3
  • TI-2017-11471 Improper input validation in Apache NiFi CVSS 3.0CRITICAL 9.8
  • TI-2018-01212 XML external entity injection in Apache NiFi CVSS 3.0CRITICAL 9.8
  • TI-2021-03489 Deserialization of untrusted data in jackson-databind CVSS 3.1HIGH 8.1
See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences