CVE-2026-71554 h2: Duplicate Host header could facilitate request smuggling

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...

SUSE: Security Advisory (SUSE-SU-2026:20187-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Security update for python-h2 (moderate)

openSUSE security update: security update for python-h2 ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:20122-1 Rating: moderate References: bsc1248737 Cross-References: CVE-2025-57804 CVSS scores: CVE-2025-57804 SUSE : 5.3...

OPENSUSE-SU-2026:20122-1 Security update for python-h2

This update for python-h2 fixes the following issues: - CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737...

SUSE-SU-2026:20187-1 Security update for python-h2

This update for python-h2 fixes the following issues: - CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737...

Astra Linux – Vulnerability in python-h2

h2 is a pure-Python implementation of an HTTP/2 protocol stack. Prior to version 4.3.0, there was a vulnerability in HTTP/2 request splitting that allowed attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurred when servers downgraded HTTP/2 request...

SUSE SLES15 Security Update : python-h2 (SUSE-SU-2025:03273-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2025:03273-1 advisory. - CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737 Tenable has extracted the preceding...

SUSE-SU-2025:03273-1 Security update for python-h2

This update for python-h2 fixes the following issues: - CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737...

Medium: python-h2

Issue Overview: h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurs when servers downgrade HTTP/2 requests to...

openSUSE Security Advisory (SUSE-SU-2025:03199-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-h2 (SUSE-SU-2025:03199-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2025:03199-1 advisory. - CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737 Tenable h...

OESA-2025-2250 python-h2 security update

This repository contains a pure-Python implementation of a HTTP/2 protocol stack. It is written from the ground up to be embeddable in whatever program you choose to use, ensuring that you can speak HTTP/2 regardless of your programming paradigm. Security Fixes: A vulnerability was found in...

Security update for python-h2

This update for python-h2 fixes the following issues: CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737 Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or "zypper patch". Alternatively...

SUSE-SU-2025:03199-1 Security update for python-h2

This update for python-h2 fixes the following issues: - CVE-2025-57804: Fixed HTTP Request Smuggling due to illegal characters in headers bsc1248737...

Debian dla-4290 : python3-h2 - security update

The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dla-4290 advisory. ------------------------------------------------------------------------- Debian LTS Advisory DLA-4290-1 [email protected] https://www.debian.org/lts/security/...

DLA-4290-1 python-h2 - security update

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acelerai (=0.0.32), acelerai-staging (>=0.0.1 <=0.0.9) +102 more potentially affected by CVE-2025-57804 via h2 (>=4.0.0 <=4.2.0)

h2 PYPI version =4.0.0, =0.0.1, =0.0.1, =0.2.2, =1.0.0, =0.1.12, =0.0.1, =0.1.3, =0.1.19 - coif =0.0.1 and more Source cves: CVE-2025-57804 Source advisory: SNYK:PYTHON-H2-12201340...