- Description
- 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.
- Source
- security@apache.org
- NVD status
- Analyzed
- Products
- nifi
CVSS 4.0
- Type
- Secondary
- Base score
- 6.3
- Impact score
- -
- Exploitability score
- -
- Vector string
- 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
- Severity
- MEDIUM
CVSS 3.1
- Type
- Primary
- Base score
- 5.3
- Impact score
- 1.4
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Severity
- MEDIUM
- security@apache.org
- CWE-346
- Hype score
- Not currently trending
Recent CVEs impact Apache NiFi (CVE-2026-54665, CVE-2026-44914) & critical DNS metadata leakage noted in QUIC/TLS (June 22). This exposes data privacy in transit. Patch & secure now! #Cybersecurity #Vulnerabilities #DataPrivacy
@YourAnon_irc
23 Jun 2026
16 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
CVE-2026-54665 in Apache NiFi: pre-auth host header injection. X-Forwarded-Host or X-ProxyHost gets reflected into OAuth2 redirect_uri, SAML SP, CSRF cookie URI. A 2025 refactor deleted the 318-line allowlist enforcer. Fixed in 2.10.0. https://t.co/6AkYlIrs6x #cve #infosec ht
@bl4cksku111
21 Jun 2026
51 Impressions
1 Retweet
1 Like
1 Bookmark
0 Replies
0 Quotes
CVE-2026-54665 in Apache NiFi: pre-auth host header injection. X-Forwarded-Host or X-ProxyHost gets reflected into OAuth2 redirect_uri, SAML SP, CSRF cookie URI. A 2025 refactor deleted the 318-line allowlist enforcer. Fixed in 2.10.0. https://t.co/6AkYlIrs6x #cve #infosec
@bl4cksku111
21 Jun 2026
2 Impressions
0 Retweets
0 Likes
0 Bookmarks
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CVE-2026-54665 CVE-2026-54665 https://t.co/4xCriJoKWj Don't wait vulnerability scanning results: https://t.co/oh1APvMMnd
@VulmonFeeds
20 Jun 2026
33 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A4E29D0D-B12D-48D1-9257-B53A364819BE",
"versionEndExcluding": "2.10.0",
"versionStartIncluding": "0.0.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
]