High severity7.5NVD Advisory· Published Oct 1, 2020· Updated Jun 17, 2026
CVE-2020-9491
CVE-2020-9491
Description
In Apache NiFi 1.2.0 to 1.11.4, the NiFi UI and API were protected by mandating TLS v1.2, as well as listening connections established by processors like ListenHTTP, HandleHttpRequest, etc. However intracluster communication such as cluster request replication, Site-to-Site, and load balanced queues continued to support TLS v1.0 or v1.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.nifi:nifiMaven | >= 1.2.0, < 1.12.0-RC1 | 1.12.0-RC1 |
Affected products
4- Apache/NiFidescription
- osv-coords2 versions
>= 1.0.0, <= 1.11.4+ 1 more
- (no CPE)range: >= 1.0.0, <= 1.11.4
- (no CPE)range: >= 1.2.0, < 1.12.0-RC1
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-rfmp-jvr7-hx78ghsaADVISORY
- nifi.apache.org/securitynvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2020-9491ghsaADVISORY
- github.com/apache/nifi/commit/441781cec50f77d9f1e65093f55bbd614b8c5ec6ghsaWEB
- lists.apache.org/thread.html/r2d9c21f9ec35d66f2bb42f8abe876dabd786166b6284e9a33582c718@%3Ccommits.nifi.apache.org%3EghsaWEB
- lists.apache.org/thread.html/re48582efe2ac973f8cff55c8b346825cb491c71935e15ab2d61ef3bf@%3Ccommits.nifi.apache.org%3EghsaWEB
- lists.apache.org/thread.html/r2d9c21f9ec35d66f2bb42f8abe876dabd786166b6284e9a33582c718%40%3Ccommits.nifi.apache.org%3Envd
- lists.apache.org/thread.html/re48582efe2ac973f8cff55c8b346825cb491c71935e15ab2d61ef3bf%40%3Ccommits.nifi.apache.org%3Envd
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