CVE-2026-54665 json
Apache NiFi: Missing Validation for Proxy Host Headers
published 2026-06-22 4 mo ago modified 2026-10-25 14 d ago also BIT-nifi-2026-54665 , EUVD-2026-38216 , GHSA-8vm2-c32j-mvfr
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
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.
Patch / fix
- maven org.apache.nifi:nifi-jetty 2.10.0
- bitnami nifi 2.10.0
- Apache Software Foundation Apache NiFi 2.10.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/S:N/AU:Y/R:A/V:D/RE:L/U:Green |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:A/V:D/RE:L/U:Green |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.nifi:nifi-jetty | <2.10.0 |
2.10.0 |
| bitnami | nifi | >=0.0.1, <2.10.0 |
2.10.0 |
Affected products
- Apache Software Foundation Apache NiFi
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/apache/nifi/commit/41625c4433898922b0a3e7635f597cb4ef197c28
web
-
lists.apache.org
/thread/y0yoblon8f6dp00qz5r90cxq5n6g4j6k
vendor-advisory, web, mailing-list, advisory
-
openwall.com
/lists/oss-security/2026/06/20/7
web, third-party-advisory, mailing-list, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-54665
advisory, web
-
github.com
/apache/nifi
package
Sources
- CVE List CVE-2026-54665
- GitHub Advisory GHSA-8vm2-c32j-mvfr
- NVD CVE-2026-54665
- OSV BIT-nifi-2026-54665
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.