CVE-2026-100663
| Reporter | Title | Published | Views | Family All 18 |
|---|---|---|---|---|
 | Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to multiple issues in Netty's HTTP/3 codec | 22 Oct 202620:23 | – | ibm |
 | CVE-2026-100663 | 28 Sep 202601:16 | – | circl |
 | CVE-2026-100663 Netty HTTP/1 CONNECT authority-form mistranslated to malformed HTTP/3 | 26 Sep 202613:23 | – | cvelist |
 | CVE-2026-100663 | 26 Sep 202613:23 | – | debiancve |
 | EUVD-2026-87757 | 26 Sep 202613:23 | – | euvd |
 | CVE-2026-100663 | 26 Sep 202613:23 | – | mend |
 | CVE-2026-100663 | 26 Sep 202614:16 | – | nvd |
 | CVE-2026-100663 Netty HTTP/1 CONNECT authority-form mistranslated to malformed HTTP/3 | 26 Sep 202613:23 | – | osv_cve |
| UBUNTU-CVE-2026-100663 | 26 Sep 202614:16 | – | osv_ubuntu |
 | PT-2026-99334 | 26 Sep 202600:00 | – | ptsecurity |
10
[
{
"vendor": "netty",
"product": "netty",
"defaultStatus": "unaffected",
"packageURL": "pkg:maven/io.netty/netty-codec-http3",
"versions": [
{
"version": "4.2.2.Final",
"status": "affected",
"versionType": "custom",
"lessThan": "4.2.18.Final"
},
{
"version": "4.2.18.Final",
"status": "unaffected",
"versionType": "custom"
}
]
}
]| Parameter | Position | Path | Description | CWE |
|---|---|---|---|---|
| Host | path | / | Netty's HTTP/3 codec fails to correctly handle HTTP/1 CONNECT requests when converting to HTTP/3. An attacker can provide a Host header that differs from the CONNECT request-target, allowing them to bypass allow-lists or egress policies because the :authority in the resulting HTTP/3 request is derived from the Host header. | CWE-20 |
| CONNECT | path | / | Netty's HTTP/3 codec fails to correctly handle HTTP/1 CONNECT requests when converting to HTTP/3. An attacker can provide a Host header that differs from the CONNECT request-target, allowing them to bypass allow-lists or egress policies because the :authority in the resulting HTTP/3 request is derived from the Host header. | CWE-20 |
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28 Sep 2026 19:16Current
6Medium risk
Vulners AI Score6
CVSS 3.17.5
CVSS 48.7
EPSS0.00301
SSVC