https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Sat, 03 Oct 2026 10:13:04 +0000 https://cve.radiocsirt.org/vuln/bell-cve-2026-71554 <p><strong>Affected:</strong> Alpaquita:23: py3-h2, Alpaquita:25: py3-h2, Alpaquita:stream: py3-h2</p> <p><strong>Affected:</strong> Alpaquita:23: py3-h2, Alpaquita:25: py3-h2, Alpaquita:stream: py3-h2</p> https://cve.radiocsirt.org/vuln/bell-cve-2026-71554 https://cve.radiocsirt.org/vuln/brew-bilix-cve-2026-71554 <p><strong>Affected:</strong> Homebrew: bilix</p> <p>### Impact h2 &lt;=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive (CWE-444).</p> <p>### Patches Patched and fixed in v4.4.1</p> <p>### Workarounds Users of the h2 library are advised to check and follow HTTP semantics best practices in their application code. h2 provides best effort sanity checks, but ultimately the calling code is responsible to ensure proper and safe usage of HTTP/2 as provided by h2, hyperframe, and hpack.</p> <p>### References Similar to the previously disclosed and fixed duplicate content-length issue.</p> <p><strong>Affected:</strong> Homebrew: bilix</p> <p>### Impact h2 &lt;=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive (CWE-444).</p> <p>### Patches Patched and fixed in v4.4.1</p> <p>### Workarounds Users of the h2 library are advised to check and follow HTTP semantics best practices in their application code. h2 provides best effort sanity checks, but ultimately the calling code is responsible to ensure proper and safe usage of HTTP/2 as provided by h2, hyperframe, and hpack.</p> <p>### References Similar to the previously disclosed and fixed duplicate content-length issue.</p> https://cve.radiocsirt.org/vuln/brew-bilix-cve-2026-71554 https://cve.radiocsirt.org/vuln/cleanstart-2026-vq36233 <p><strong>Affected:</strong> CleanStart: airflow-3</p> <p>CVE-2026-71554 affects multiple packages. This issue is resolved in later releases. See references for individual vulnerability details.</p> <p><strong>Affected:</strong> CleanStart: airflow-3</p> <p>CVE-2026-71554 affects multiple packages. This issue is resolved in later releases. See references for individual vulnerability details.</p> https://cve.radiocsirt.org/vuln/cleanstart-2026-vq36233 https://cve.radiocsirt.org/vuln/euvd-2026-349512 EUVD-2026-349512 https://cve.radiocsirt.org/vuln/euvd-2026-349512 https://cve.radiocsirt.org/vuln/fkie_cve-2026-71554 <p>h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, providing a request smuggling primitive. This issue is fixed in version 4.4.1.</p> <p>h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, providing a request smuggling primitive. This issue is fixed in version 4.4.1.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-71554 https://cve.radiocsirt.org/vuln/ghsa-6hr6-w5qg-qmwg <p><strong>Affected:</strong> PyPI: h2</p> <p>### Impact h2 &lt;=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive (CWE-444).</p> <p>### Patches Patched and fixed in v4.4.1</p> <p>### Workarounds Users of the h2 library are advised to check and follow HTTP semantics best practices in their application code. h2 provides best effort sanity checks, but ultimately the calling code is responsible to ensure proper and safe usage of HTTP/2 as provided by h2, hyperframe, and hpack.</p> <p>### References Similar to the previously disclosed and fixed duplicate content-length issue.</p> <p><strong>Affected:</strong> PyPI: h2</p> <p>### Impact h2 &lt;=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive (CWE-444).</p> <p>### Patches Patched and fixed in v4.4.1</p> <p>### Workarounds Users of the h2 library are advised to check and follow HTTP semantics best practices in their application code. h2 provides best effort sanity checks, but ultimately the calling code is responsible to ensure proper and safe usage of HTTP/2 as provided by h2, hyperframe, and hpack.</p> <p>### References Similar to the previously disclosed and fixed duplicate content-length issue.</p> https://cve.radiocsirt.org/vuln/ghsa-6hr6-w5qg-qmwg https://cve.radiocsirt.org/vuln/opensuse-su-2026:11523-1 <p>python313-h2-4.4.1-1.1 on GA media</p> <p>python313-h2-4.4.1-1.1 on GA media</p> https://cve.radiocsirt.org/vuln/opensuse-su-2026:11523-1 https://cve.radiocsirt.org/vuln/pysec-2026-3628 <p><strong>Affected:</strong> PyPI: h2</p> <p>### Impact h2 &lt;=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive (CWE-444).</p> <p>### Patches Patched and fixed in v4.4.1</p> <p>### Workarounds Users of the h2 library are advised to check and follow HTTP semantics best practices in their application code. h2 provides best effort sanity checks, but ultimately the calling code is responsible to ensure proper and safe usage of HTTP/2 as provided by h2, hyperframe, and hpack.</p> <p>### References Similar to the previously disclosed and fixed duplicate content-length issue.</p> <p><strong>Affected:</strong> PyPI: h2</p> <p>### Impact h2 &lt;=4.4.0 accepts request header blocks containing more than one Host header, and forwards every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, which is a request smuggling primitive (CWE-444).</p> <p>### Patches Patched and fixed in v4.4.1</p> <p>### Workarounds Users of the h2 library are advised to check and follow HTTP semantics best practices in their application code. h2 provides best effort sanity checks, but ultimately the calling code is responsible to ensure proper and safe usage of HTTP/2 as provided by h2, hyperframe, and hpack.</p> <p>### References Similar to the previously disclosed and fixed duplicate content-length issue.</p> https://cve.radiocsirt.org/vuln/pysec-2026-3628 https://cve.radiocsirt.org/vuln/suse-su-2026:23563-1 <p>Security update for python-h2</p> <p>Security update for python-h2</p> https://cve.radiocsirt.org/vuln/suse-su-2026:23563-1 https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-71554 <p><strong>Affected:</strong> Ubuntu:18.04:LTS: python-h2, Ubuntu:20.04:LTS: python-h2, Ubuntu:22.04:LTS: python-h2, Ubuntu:24.04:LTS: python-h2, Ubuntu:26.04:LTS: python-h2</p> <p>h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, providing a request smuggling primitive. This issue is fixed in version 4.4.1.</p> <p><strong>Affected:</strong> Ubuntu:18.04:LTS: python-h2, Ubuntu:20.04:LTS: python-h2, Ubuntu:22.04:LTS: python-h2, Ubuntu:24.04:LTS: python-h2, Ubuntu:26.04:LTS: python-h2</p> <p>h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, providing a request smuggling primitive. This issue is fixed in version 4.4.1.</p> https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-71554