Каталог CVE

CVE-2026-100663

Netty's HTTP/3 codec (io.netty:netty-codec-http3)…

Netty's HTTP/3 codec (io.netty:netty-codec-http3) from 4.2.2.Final through 4.2.17.Final does not special-case HTTP/1 CONNECT authority-form request-targets when converting HTTP/1 messages to HTTP/3 in HttpConversionUtil.toHttp3Headers. The authority-form target (e.g., "CONNECT trusted.example:443") is parsed as a URI, so its host is emitted as :scheme, :path is set to "/", and the HTTP/1 Host header is used as :authority; if no Host header is present the CONNECT target is dropped. In a Netty-based HTTP/1-to-HTTP/3 proxy or gateway, a remote client can send a CONNECT request whose Host header names a different authority than the request-target, producing a malformed HTTP/3 CONNECT whose tunnel :authority is attacker-controlled. This can bypass tunnel allow-lists, egress policy, backend selection, or audit controls that validate the HTTP/1 CONNECT request-target before forwarding over HTTP/3. The issue is fixed in 4.2.18.Final.

Критичність: High · CVSS 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Sep 9, 2026, 10:00:00 PM UTC
Updated: Sep 26, 2026, 2:16:49 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.30% · Oct 27, 2026

Projects and upstream resources

[netty][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie-security	netty	`1:4.1.48-10+deb13u1`	Not affected	[CVE-2026-100663]
Debiantrixie	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debiantrixie	netty	`1:4.1.48-10+deb13u1`	Not affected	[CVE-2026-100663]
Debiansid	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debiansid	netty	`1:4.1.48-16`	Not affected	[CVE-2026-100663]
Debianforky	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debianforky	netty	`1:4.1.48-16`	Not affected	[CVE-2026-100663]
Debianbookworm-security	netty	`1:4.1.48-7+deb12u2`	Not affected	[CVE-2026-100663]
Debianbookworm	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debianbookworm	netty	`1:4.1.48-7+deb12u2`	Not affected	[CVE-2026-100663]

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debianbookworm	netty	`1:4.1.48-7+deb12u2`	Not affected	[CVE-2026-100663]
Debianbookworm-security	netty	`1:4.1.48-7+deb12u2`	Not affected	[CVE-2026-100663]
Debianforky	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debianforky	netty	`1:4.1.48-16`	Not affected	[CVE-2026-100663]
Debiansid	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debiansid	netty	`1:4.1.48-16`	Not affected	[CVE-2026-100663]
Debiantrixie	netty	Not reported	Not affectedDistribution reports not affected	[CVE-2026-100663]
Debiantrixie	netty	`1:4.1.48-10+deb13u1`	Not affected	[CVE-2026-100663]
Debiantrixie-security	netty	`1:4.1.48-10+deb13u1`	Not affected	[CVE-2026-100663]

Original provider fields

{
  "package_releases": [
    {
      "name": "netty",
      "status": "not affected",
      "release": "sid",
      "version": "1:4.1.48-16"
    },
    {
      "name": "netty",
      "status": "not affected",
      "release": "forky",
      "version": "1:4.1.48-16"
    },
    {
      "name": "netty",
      "status": "not affected",
      "release": "trixie",
      "version": "1:4.1.48-10+deb13u1"
    },
    {
      "name": "netty",
      "status": "not affected",
      "release": "trixie-security",
      "version": "1:4.1.48-10+deb13u1"
    },
    {
      "name": "netty",
      "status": "not affected",
      "release": "bookworm",
      "version": "1:4.1.48-7+deb12u2"
    },
    {
      "name": "netty",
      "status": "not affected",
      "release": "bookworm-security",
      "version": "1:4.1.48-7+deb12u2"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "netty",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "netty",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "netty",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "netty",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": []
}

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libnetty-java]Невідомо
Пакет джерела: [netty]
Подробиці (4)
- 1:4.1.48-7+deb12u2 · all · bookworm
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm
- 1:4.1.48-7+deb12u2 · all · bookworm
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm
- 1:4.1.48-7+deb12u2 · all · bookworm-security
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm
- 1:4.1.48-7+deb12u2 · all · bookworm-security
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm

[Debian 13 (Trixie)]

[libnetty-java]Невідомо
Пакет джерела: [netty]
Подробиці (4)
- 1:4.1.48-10+deb13u1 · all · trixie
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm
- 1:4.1.48-10+deb13u1 · all · trixie
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm
- 1:4.1.48-10+deb13u1 · all · trixie-security
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm
- 1:4.1.48-10+deb13u1 · all · trixie-security
  Невідомо
  Version impact unknown
  nvd · netty · debian · bookworm

Спостережено: Oct 29, 2026, 9:59:15 AM UTC

Посилання

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]