AlmaLinux 9 : nghttp2 (ALSA-2026:54662)

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:54662 advisory. nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests CVE-2026-58055 Tenable has extracted the...

RockyLinux 10 : nghttp2 (RLSA-2026:54650)

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:54650 advisory. nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests CVE-2026-58055 Tenable has extracted the...

CVE-2026-73530

The CVE concerns Flyto2 Core prior to 2.28.0, where SSRF guard bypass is possible via unblocked IPv6 address :: that kernels treat as loopback akin to 0.0.0.0. Attackers can cause requests or 302 redirects through http.get, http.request, and http.batch to reach services bound to IPv6 loopback, by...

CVE-2026-73530 Flyto2 Core < 2.28.0 SSRF Guard Bypass via is_private_ip()

Flyto2 Core before 2.28.0 contains a server-side request forgery guard bypass vulnerability that allows attackers to reach internal services by supplying URLs using the unblocked IPv6 address :: which the kernel routes to loopback identically to 0.0.0.0. Attackers can submit requests or trigger 3...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

.NET: .NET Core: .NET Security Feature Bypass Vulnerability

Inconsistent interpretation of http requests 'http request/response smuggling' in .NET allows an unauthorized attacker to bypass a security feature over a network...

.NET: .NET Core: .NET Security Feature Bypass Vulnerability

Inconsistent interpretation of http requests 'http request/response smuggling' in .NET allows an unauthorized attacker to bypass a security feature over a network...

.NET: .NET Core: .NET Security Feature Bypass Vulnerability

Inconsistent interpretation of http requests 'http request/response smuggling' in .NET allows an unauthorized attacker to bypass a security feature over a network...

JLSEC-2026-1281

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy which also has a po...

JLSEC-2026-1277

GNOME libsoup before 3.6.0 allows HTTP request smuggling in some configurations because '\0' characters at the end of header names are ignored, i.e., a "Transfer-Encoding\0: chunked" header is treated the same as a "Transfer-Encoding: chunked" header...

PT-2026-80519

GNOME libsoup before 3.6.0 allows HTTP request smuggling in some configurations because '0' characters at the end of header names are ignored, i.e., a "Transfer-Encoding0: chunked" header is treated the same as a "Transfer-Encoding: chunked" header...

Moderate: nghttp2 security update

libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 HTTP/2 protocol in C. Security Fixes: nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests CVE-2026-58055 For more details about the security issues,...

ALSA-2026:54662 Moderate: nghttp2 security update

libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 HTTP/2 protocol in C. Security Fixes: nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests CVE-2026-58055 For more details about the security issues,...

PT-2026-80523

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy which also has a po...

Exploit for Improper Input Validation in Boa

\ CVE-2009-4496 — Defensive Vulnerability Analysis \ Overv...

CVE-2026-12004

IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 and IBM Verify Identity Access Container 11.0 through 11.0.3 contains a format string injection vulnerability in the management interface that allows attackers to cause denial of service and...

CVE-2026-12359

IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 and IBM Verify Identity Access Container 11.0 through 11.0.3 could allow a remote attacker to access sensitive information due to an inconsistent interpretation of an HTTP request by a reverse prox...

CVE-2026-12005

IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 and IBM Verify Identity Access Container 11.0 through 11.0.3 contains a input validation vulnerability in the management interface that allows already privileged attackers to execute additional...

CVE-2026-12359

Summary: CVE-2026-12359 affects IBM Security Verify Access and IBM Verify Identity Access families (and containers) with versions 10.0–10.0.9.2, 11.0–11.0.3, and corresponding containers. Affected component is the reverse proxy’s handling of HTTP requests, described as an inconsistent interpretat...