CVE-2026-71554

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...

h2: Duplicate Host header could facilitate request smuggling

Impact h2 =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...

EUVD-2026-54177

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...

CVE-2026-71554

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...

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...

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...

CVE-2026-71554

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...

MITM (Man-in-the-Middle) org.postgresql:postgresql Dependency in Jira Software Data Center

This High severity MITM Man-in-the-Middle vulnerability was introduced in versions 9.12.37, 10.3.23, and 11.3.8 of Jira Software Data Center. This MITM Man-in-the-Middle vulnerability, with a CVSS Score of 8.2 and a CVSS Vector of CVSS:4.0/AV:N/AC:H/AT: P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N...

SUSE-SU-2026:23168-1 Security update for libssh

This update for libssh fixes the following issues - CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. - CVE-2026-59844: denial of service via oversized SFTP read length bsc1272165. - CVE-2026-59845: denial of service via unchecked ProxyCommand fork failure...

PT-2026-68817

Name of the Vulnerable Software and Affected Versions h2 versions prior to 4.4.1 Description The software accepts request header blocks containing multiple Host headers and forwards all of them to the consuming application. When the consumer downgrades the connection from HTTP/2 to HTTP/1.1, the...

PT-2026-81371

Name of the Vulnerable Software and Affected Versions rclone versions prior to 1.74.4 Description The software fails to strip the X-Amz-Security-Token header when an S3 redirect changes the scheme from HTTPS to HTTP on the same host. This allows attackers to intercept plaintext HTTP traffic and...

PT-2026-81368

Name of the Vulnerable Software and Affected Versions rclone versions prior to 1.75.0 Description The software fails to reject transport downgrades during redirect handling. This allows Basic authorization and Cookie headers to be replayed over plaintext HTTP following same-host HTTPS-to-HTTP...

PT-2026-81369

Name of the Vulnerable Software and Affected Versions rclone versions prior to 1.75.0 Description The software fails to sanitize IBM IAM bearer tokens and SSE-C Server-Side Encryption with Customer-Provided Keys encryption keys during S3 redirect callbacks. This allows credentials to be preserved...

OPENSUSE-SU-2026:21529-1 Security update for perl-HTTP-Tiny

This update for perl-HTTP-Tiny fixes the following issues: Changes in perl-HTTP-Tiny: - updated to 0.096 - CVE-2026-7017: Fixed forwarded credential headers to cross-origin redirect targets bsc1271020 - Caller-supplied Authorization, Cookie, and Proxy-Authorization headers are now stripped on...

PYSEC-2026-3587 ONNX: Heap-Buffer-Overflow READ in Gemm Version Converter Adapter via Undersized Input Shape

Summary Heap-buffer-overflow READ 16 bytes in Gemm76::adaptgemm76 onnx/versionconverter/adapters/gemm76.h:41 when ConvertVersion processes a model with a Gemm node whose input tensors have fewer than 2 dimensions. The adapter accesses Bshape1 without checking rank. On Release builds the OOB read ...

Security update for perl-HTTP-Tiny (important)

openSUSE Security Update: Security update for perl-HTTP-Tiny Announcement ID: openSUSE-SU-2026:0274-1 Rating: important References: 1271020 Cross-References: CVE-2026-7017 Affected Products: openSUSE Backports SLE-15-SP7 An update that fixes one vulnerability is now available. Description: This...

SUSE SLES15 Security Update : libssh (SUSE-SU-2026:3463-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3463-1 advisory. - CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. - CVE-2026-59844: denial of service via...

CVE-2026-53712

A flaw was found in the SCRAM Salted Challenge Response Authentication Mechanism client and common libraries. An attacker performing a man-in-the-middle MITM attack on a Transport Layer Security TLS connection can silently downgrade the authentication process. This vulnerability allows the attack...

Security update for libssh

This update for libssh fixes the following issues: CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. CVE-2026-59844: denial of service via oversized SFTP read length bsc1272165. CVE-2026-59845: denial of service via unchecked ProxyCommand fork failure bsc127216...

SUSE-SU-2026:3463-1 Security update for libssh

This update for libssh fixes the following issues: - CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. - CVE-2026-59844: denial of service via oversized SFTP read length bsc1272165. - CVE-2026-59845: denial of service via unchecked ProxyCommand fork failure...