CVE•Published 2020-01-29•Modified 2026-10-08•1 article on news•6 live references•NVD data
CVE-2019-20445Netty · Netty
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
96
Exploit Prediction Scoring System · top 4% of all CVEs
Weaknesses (CWE)
Description
HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header.
Timeline
Published 2020-01-29
Modified 2026-10-08
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag83 hosts
vuln:CVE-2019-20445Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Netty Netty"All exposed Netty Netty instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Netty"HTTP body or banner mentions "Netty" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2019-20445Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2019-20445Censys host search filtered to this CVE id.
grep.app
CVE-2019-20445Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2019-20445GitHub code search for direct mentions.
Google dork
"CVE-2019-20445" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.