CVE•Published 2026-09-10•Modified 2026-09-10•0 articles on news•4 live references•NVD data
CVE-2026-89044
Vulnerability data via NVD (ingested)
CVSS v3.1
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS percentile
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Weaknesses (CWE)
Description
Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly validate the final transfer coding in the Transfer-Encoding header, allowing attackers to smuggle requests by using malformed encoding declarations. Attackers can split Transfer-Encoding headers across multiple lines or use values like 'chunked, xchunked' to bypass validation and decode messages as chunked when the final coding is not chunked, enabling request smuggling attacks.
Timeline
Published 2026-09-10
Modified 2026-09-10
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-89044Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-89044Censys host search filtered to this CVE id.
grep.app
CVE-2026-89044Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-89044GitHub code search for direct mentions.
Google dork
"CVE-2026-89044" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-89044 on GitHub.
We haven't classified any articles referencing CVE-2026-89044 yet. The external references above still apply.