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Advisory record · GHSA-8vm2-c32j-mvfr

Apache NiFi fails to validate proxy host headers when constructing qualified URLs

CVSS 6.3 MediumEPSS 0.0033 · 25th percentile

Published by the GitHub Advisory Database at 22 Jun 2026, 09:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.nifi:nifi-jettyMaven<2.10.02.10.0
Identifiers
GHSA-8vm2-c32j-mvfr · CVE-2026-54665
Weakness (CWE)
CWE-346
Tags
Published
22 Jun 2026
Updated
11 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Apache NiFi (nifi-jetty package) versions 0.0.1 through 2.9.0 are affected. A client can send crafted proxy or forwarded host headers that cause NiFi web services to build invalid qualified URLs for redirects or data references. Upgrade to version 2.10.0, which validates these headers against the nifi.web.proxy.host property; the source notes that enabling this validation requires HTTPS, and reverse proxies in front of NiFi can also filter these headers.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 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 CNA (apache)
  • CISA KEV Not listed.
  • EPSS 0.0033, the 25th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.