CVE•Published 2026-05-13•Modified 2026-05-18•0 articles on news•5 live references•NVD data
CVE-2026-42577Netty · Netty
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
Netty is an asynchronous, event-driven network application framework. From 4.2.0.Final to 4.2.13.Final , Netty's epoll transport fails to detect and close TCP connections that receive a RST after being half-closed, leading to stale channels that are never cleaned up and, in some code paths, a 100% CPU busy-loop in the event loop thread. This vulnerability is fixed in 4.2.13.Final.
Timeline
Published 2026-05-13
Modified 2026-05-18
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 tag0 hosts
vuln:CVE-2026-42577Hosts 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-2026-42577Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42577Censys host search filtered to this CVE id.
grep.app
CVE-2026-42577Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42577GitHub code search for direct mentions.
Google dork
"CVE-2026-42577" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42577 on GitHub.
We haven't classified any articles referencing CVE-2026-42577 yet. The external references above still apply.